1990z28

Ok well right now I got a 305 TBI and I got a 350 4 bolt main 1970 block and got the internals so I was wondering could I swap over the heads intake and all that stuff like the pulleys and covers and sensors over to the 350 block. Or is it worth it to get a regulator and a new intake and throw a carb on it. Which one would be cheaper for me tell I build up the 350 for power. I also want to keep the T-5 in there for now would it be able to handle the bit more of power. But no matter what I know I would need a gasket overhaul kit, a new oilpan, a dipstick, and some good cleaner, and new freeze plugs. Also would I be able to put a bigger cam in then whats in the 305 or would it screw up the ECM if I can do this. Please get back to me and I am trying to save money so which one will be easier and cheaper for me now tell I do a build up.

RED86Z28

You will need a different flywheel and oil pan. The older block will need to run a non roller EFI compatable cam. Everything else thats important should bolt up without a problem. It should be easy to find a place to custom tune the TBI for your 350. The T5 should hold up decently since this is not a very wild engine plan.
A carb will make a little more power but I think the drivability of properly tuned TBI is worth it.

1990z28

Ok thank you so since i need a EFI cam could I just take it out of the 305 and I know the one in the 305 is not stock. And what all would have to be tuned for it to work properly.

1990z28

Ok does anyone have a idea on a oil pan I can use. That will fit with no problem and not the stock shape and everything. Also where can I get a flywheel to fit the 10.5 clutch on the 2 piece rear main crank. I am not looking to spend a lot on these 2 things. Also what about a dipstick. And what do you guys recommended for a cleaner to make everything look nice. I do plan on painting the block what paint should I use and also is it worth it to take a die grinder to give the intake a smooth clean look.

Atilla the Fun

Use the oil pan for an early '70s Camaro. No big deal. Do NOT polish the passages inside the intake manifold. That'll just create unwanted fuel puddling.
For a flywheel, get one for an 84 Z28.
You probably can't use the 305's cam. If the 305 is using roller lifters, then you cant. If someone has stupidly converted it to non-roller, then you can, but you'll need new lifters.

RED86Z28

You can use a cheap auto parts store dipstick for small block engines with drivers side dipsticks. Any paint sold as engine paint will work fine. Low gloss black is my favorite. For an air cleaner I would use a 14" with the tallest filter that will clear the hood.

1990z28

By cleaner I wasent talking bout the air cleaner. And thank you and since I will need new lifters if they are rollers. I do have a no roller cam sitting around but I think it may be to big for the ECM and everything its a decent sized cam I would guess maybe a 450 lift or so. I have really looked. And whats the differences in the roller and non roller lifters. And why are they not interchangeable. Will I be able to use the stock pushrods if they are good.

RED86Z28

Sorry about the air cleaner part. The pushrods will not be reusuable if you have a roller 305. The lifters do not interchange because the engine block is not set up for them and non roller cams have a different profile. I would see what comp cams recomends for this engine and buy one of their cam and lifter kits.

1990z28

OK so pretty much I can use heads and intake no problem and the accessorys. Would it be worth it to me to save money and clean up the 1970 heads I have I dont know the numbers on them they are dirty. When I bought the block it had like a inch of build up on the outside and all but is a good block no cracks and no rust for a 40 year old block. They heads look good I could port then and clean them up but I dont know how I would clean them up since in the water ports it has a build up of something I dont know if it was something put there to seal them from getting stuff in them. And would the intake bolt up no problem if I did that. And will all the sensors go no problem with the bock and everything. This isent something that I have to do my 305 is fine just crazy idle. If I can get it done for under 500 that would be great so I could get the 305 out and sell it maybe or save it for a later car. With everything so far as gaskets, oil pan, oil pump and pickup and the shaft, freeze plugs, timing cover, timing gears, bearings, and flywheel. that tallys up to bout 300 roughly. Adding push rods and lifters and maybe a cam would add like 150+ and thats if I used the 305 heads and everything and all the bolts off of it and nothing new. If I get a bolt get for heads and everything that would be bout another 100+. Thats already over my small budget to put the 350 in tell I build it up. The engine was bought for a 355 build up of high compression supercharger nitrous fed engine. So I want a small budget build with the stock crank and pistons from the block and maybe the heads. And if I use the stock heads I would need to get new covers also. Its it ok its my fault on the air cleaner thing I should of been more specific on what I meant.

RED86Z28

Since the budget is tight you might want to consider a generic 204/214 cam. I have seen them for less than $100 with lifters on jegs or summit. The TBI forum would probably be a good place to ask about that cam and how it works with TBI for the temporary engine. I would stay with the 305 heads. The 70 heads will require a different intake bolt pattern and probably would require some work before use. What casting number are they?

1990z28

Ok I just checked my extra cam I dont know how exact my measurement will be its a flat tappet comp cam intake I came out with about a .400 and exhaust bout a .385 lift. I dont know the duration but it gave a good sound when it was in my truck. I found some cheap lifter made by summit but I dont know who really makes the there 4 bucks a piece its not going to be a big performance engine right now so will that be good for street drive with reasonable rpm and not high high kicks. There said to handle 6000 rpm and are the hydraulic flat tappet lifters. I think I can make that into my budget and make it under what I am willing to pay right now for it all. And does anyone know by chance which length of pushrods I will need I would like to know for the stock 305 heads and the 1970 350 heads I can get the number if need be.

1990z28

Ill get the casting numbers tonight all I know is it was in a truck before it was pulled I was going to sell the heads also.

1990z28

This is the information on my heads
Years used
1968-72
Number
3923441
CID
350
Intake
1.94
Exhaust
1.5001