Ok here is what i am having a hard time deciding on...

My 305 just turned 100,000 miles the other day. It has as oil leak, Rear Seal, and is starting to burn a little oil now. My question is, should i put the money into rebuilding it or look for a 350? i dont have a ton of cash to spend so i am thinking a rebuild of my 305 will be better. Anyone have any tips/advice they want to give??? THANKS A LOT!!!

P.S. I think my mom wants me to get a new car but i just cant get rid of my baby!!! Other than that there isnt anything wrong with her, she looks BEAUTIFUL!!!!

 

get a 350 or 383.

 

If the engine has been half-way decently maintained, most likely the bottom end is okay. You're probably getting oil past your valve stem seals, which isn't a big deal to fix. Neither is the rear main seal.

But, before you consider giving the block to a machine shop, look into getting a 350 core to rebuild. It will most likely cost less to build (although recently I've seen 305 rebuild kits that were the same price as 350 kits - that wasn't the case before), but the net results will be worth it even if it is a couple hundred more to do. That may sound like a lot, but it isn't, really, for the difference in performance you'll get.

Remember, this is coming from a guy who jazzed up his 305. I may finally have a line on a 350 builder...

 

I replaced the 305 TBI motor in my 92 RS with a 350 last year.
If you can afford it, I'd go with the extra cubes every time.
I bought a 300HP 350 long block from www.goautocenter.com.
It was $1855 plus shipping and came with a Crane Compucam(hydraulic roller), and all new GM parts,PM Rods,crank,Iron TPI heads,oil pan,timing cover, etc.Warranteed for 24,000 miles, more for extra $.Totally transformed the car!
Almost twice the HP and Torque than the 305, and I'm still running TBI (much less expensive than TPI).Passes smog in California as a 305, too!
-Rich-

 

I replaced my 305 with a 350 and now I'm kicking myself.
I spent $3000 (Canadian) building a 350 with 9.2:1, 1.94/1.50 valves, and Comp hydraulic roller cam. But now I'm broke and can't afford to do the exhaust, and the stock 305 TBI exhaust really chokes a 350! For half the price I could've just installed the cam I have in my 350 in the 305, and added headers and 3" catback exhaust, and I'd be making more ponies.

 

Are you talkin about your mom or the car?

 

Well the honest answer is both... heheheheh

Being close to mothers day and all.... not to mention that i do love my mom... they both are beautiful....

But i guess i was really talking about the car....

Thanks to all of you that have replied!!!

 

i was in a simliar situation cept the 305 in my car was dead, i decided to rebuild it which ended up costing alot and in the end, im gona get a 350, so my advise, forget about the 305 and go with the 350.

 

Well... I'm at a crossroads....

I've invested about $500 into my 305 so far, and I'm merely getting ready to put the shortblock together.

I still have some little things to obtain yet, so I'm not done yet.

I'll probably end up spending about $1000.

And have a car that is non-smog....

I like the idea of Rich getting the engine that still passes smog under 305 standards.

 

put the 305 in here and forsure go 350 or bigger

 

If you go with a different motor, I may be interested in your old 305.

Email if you decide to get rid of it.

Thanks

Tom
Indy82z@yahoo.com