I figured I'd repost this year old topic that has renewed it's self. I'm doin the swap right now and am using a mondello performance kit on this engine. bigger isn'y always better. -Colt https://www.thirdgen.org/techbb2/sho...00#post2218100

 

I wish I could wish you well. I think you're in for a bunch of headaches and heartaches.

Bigger isn't always better, but it usually is.

 

nah, I've got everything mapped out, should go easy from here on out. And hey, who can say they've done this swap? no-one, so no-one can really have a hard-fact experience opinion about it. If it wasn't for those who decided to try something new, undone and unique back in the first days of rodding, we would be no-where right now, no one would have the cars they do now. later on maybe something else will go in, maybe a 403 olds. same block design and all. this is an experiment, and a really odd one at that I realize. So lets see what happens. -Colt

 

I dont think that five7 was hinting at problems installing the engine, I think he was referring to the problems after that engine is in the car. At least you will have an excuse though, "hey, its only a 307!" Bigger is pretty much always better. For the parts and money invested a 350 chevy will yeild much more hp. Dont go with a 403 though, not worth it much either. I do miss my olds 307 though. It got decent mileage.

 

apparently no0ne decided to read the original post. I want 3 things, reliability, low end torque, and gas milage. 180 hp and 240 lbd torque is more than enough for me, and thats with smog equip. and the q=puke. I'll be running a holley 4, alum intake, new rotating assem., no smog, elec fans etc. I should hit about 200 hp and 260 lbs torque or so. I'm also gonna add a 100 shot of nitrous for when I DO get bored and wanna go fast. the thing here, is that the stock olds 307 can take way more abuse than any stock 350 would dream of. I got the engines out today of both the wagon and the fire chicken, takin pics tomorrow. -Colt

 

In fact, I did read the original post. It's my "job", you know.

As stated, the factory never installed Olds V8's in 3rd gens, and although some people have reported the installation of a Pontiac or Buick V8 in their 3rd gen, you're the only one who I recall (at least in recent days) that's seriously talked about putting an Olds 307 V8 in your 3rd gen (although several have asked about the 307 they had laying around, and when it was determined that they did indeed have an Olds 307 and not a SBC 307, they dropped it).

Go ahead and be different - nobody is telling you that you can't. Go ahead and use the engine you have. Go ahead and believe what you want about the design benefits of the Olds 307. It's your car, it's your money. Go ahead and do it. Just don't expect us to give our blessing or agree with you that it is the best approach to obtaining your objectives.

We've expressed our opinions, you seem bent on changing ours to conform to yours. Just go prove us wrong. If you can. You'd better keep detailed records of the expense and time required to do it, as well as the non-financial aspects such as special fabrication that you may have the skill to perform (but the typical 3rd gen'r may not). When you're done, provide detailed and verifiable performance records that prove you've met your objectives (we'll give you a few years for the longevity part).

Oh, yeah, for the record: You'll be in violation of Federal emissions laws if you use a Holley carb and "no smog"...

Your own words:

"I always have rebelled against good advice."

"This is getting to be a really long post. I like that."

My words: "I don't."

 

hmm, I live in mason county, no emmisions TOO go through, so I'm not worried about it. And besides, thousands of people put carbs or carbed engines of these cars and smogged cars. So lets see hopw this goes, I'm going out right now to continue to work.
-Colt

 

gas mileage and a holley. not two words i see in a sentance very often...

 

lmao, a 600 will do fine, long as I keep my foot out of it most of the time. lol -Colt

 

Not unless bad is involved somewhere

 

hey man, where can I get one of those hamster and wheel drivetrain set-ups, those sound wicked -Colt

 

pretty funny, espec w/the skunk in the avatar.

 

You couldnt handle the hamsters, not many can

 

lmao, guess I'll have ta settle for the mice then. -Colt

 

having owned both, I do not agree with this statement at all. My 307 with 120,000 miles lasted about 2 months through moderate driving before becoming a spun-bearing, rod knocking machine. Now, granted, not every 307 is even close to like that. I've had a few friends with high mileage 307's. But, I've also owned a 187,000 mile roller 350, and currently own and run a 286,000 mile 010 350 that I'm just now tearing down, and only for performance. Stock for stock, I don't see much of a clear difference. And I would have put my old L03 305 over both in terms of longevity. It would still be assembled and running strong and smokeless in my 195,000 mile 3rdgen, if I would have been willing to put up with 170 HP any longer.

That being said, I have just done the opposite of your swap, taking a B.O.P. out of an '86 Olds Cutlass, and swapping in an SBC. It's not as bad as people on both sides of the fence will tell you it is, but isn't easy without the right tools/skills. I wouldn't opt for a 307 in a 3rd gen, but given that you've got a V6, you're in for a decent amount of work putting a SBC in anyways, so I can't blame you for running what you got.

I've got a mostly good 307 sitting in the garage, about to be parted out. If you need any parts, PM me. All of my pulleys worked except for the water pump which has a bad impeller. I wouldn't trust the internals or the cylinder heads on it, but everything else is good.

And if you haven't considered it yet, you might want to get those 307 heads milled. I'm fairly sure with either the 5A OR 7A heads, that motor is running 8.1-1 compression, and you can get a lot of performance out of merely having them milled some. If you haven't yet, check out www.oldspower.com . They've got some people who have got very streetable 307's into the 13's.

 

awsome, I need exhaust valves, and yes, I have the 5a heads. if you had the roller lifters and cam you'd be a *** to me. lol. well, lemme know. -Colt

 

You are taking photos, right? Be sure and post them so we can keep track of this.

 

OMG!! I just did the motor mounts, and had to drop the suspension to do it, but I just got the suspension back in, anmd the motor in the car, and OMG!! thing looks WICKED!!!! I gotta get photos tomorrow, please remind me. -Colt

 

My stock 305 had 295lb-ft torque. IIRC someone offered you a 305 for FREE. That'd have been cheaper/easier than what you're attempting. Though, I guess that's what makes things all the more fun sometimes though too.

Oh and don't think you'll be going "fast" with a 100-shot on a 307 that's putting out 200HP. That'll be like a 15 flat car.

In any case, good luck with it I suppose.

 

Aww,go easy on him guys,he's just a kid.I can promise one of two things will happen.
A.he will learn there is no replacement for the voice of experiance when he stands on this thing and nothing happens,or
B.He'll be one of those wierdos who will buy ANY leftover junk you've got from a swap to a GOOD engine.

Nitrovamp,I want you to answer this honestly.Yes,hotrodding was invented by trying new things.But considering these cars are at the newest 13 years old,if this was a good swap,wouldn't more of us be running 307 ,or a 301 Pontiac,or maybe any one of the tiny smallblock chevys,or how about a 304 AMC,or.......the point is,if I can twist a 406 chevy to 8500,how much more durability do you want?!

 

well, I've got the new full roller 350 in. lmao I part traded the 307 in for a full roller 350 bored .030 over, 64cc heads, (with pop-ups!!) an edelbrock performer rpm high-rise, 750cfm vacuum second holley, and all the bells and whistles and chrome you could ever want. I'm waiting for the rain to clear up to go out and get pictures, I still have to do the exhaust, (2 cherry bombs) get another belt, find a steering pump bracket, and install the tranny which I'm waiting for a custom organic/kevlar clutch kit to come in from missouri. other than that I have some trickl wiring to do incl. the starter button, a few switches, etc, and a rev limiter. I timed the engine today, plumbed it up etc, and it runs like a dream. man, that things wild. Well, in any case, I'll try and get pics up soon. -Colt

 

Someone traded you a working roller 350 for a 307? Was he retarded?

 

Maybe boat anchors are hard to come by.

 

Oh no, shane didnt hack someones account, did he??

 

This has strayed from the original topic, and is turning into a flamefest.

Therefore...




(For the sake of fairness, you can see with careful reading that he said the 307 was partial trade for the 350. But, since the Olds 307 is no longer the project, there's no need to continue this thread.)