I have been getting mixed stories on what I can and can’t do here...
I have an 85 Iroc with a 305 tpi.
I can get my hands on a 350 block that has been machined, (still finding out the specs)
But I want to use my 12-264-4 comp cam, roller rockers, my tpi set up.
I would like to use my 305 heads as well, and possibly my push rods.
So, this is where the mixed stories come in to play. I have been told that I can’t use the 305 heads since the chamber is smaller. I always thought a 350 block with 305 heads created a 327.
but ive been told i could use the heads but will kill the power since im TPI ( everyone seems to be against TPI.. My first TPI and I really like it)
I only have so much money for this project. (About $500) the only reason I was even thinking about switching to a 350 is because I have to pull the motor anyways to replace the leaking oil pan gasket, and I figured I would change out all the lower end gaskets, bearing, oil pump, etc. while it was out.
I also just thought about just totally overhauling the 305 and leaving it a 305 but I can only be down a minimal about of time, it’s my daily driver. Going 350 I could build most of the lower end on a stand and then just swapper over the other when the engine is out and place the 350 back in all in a good solid weekend. So my question in a nut shell would be.
Could I use my 305 heads on a 350? and how about injectors if so? i have the stock 18#'s (alot of things like injectors, distro, ignition coil, etc... i plan on changing later in time once i have enough to do it all and DYNO tune a chip for it)
AND does anyone know of a place to get a decent inexpensive 350 master overhaul kit?
Or should I look for a FAST machine shop and a few local guys and do a wrench party and be down a few extra days...
Again does anyone know of a place to get a decent inexpensive 305 master overhaul kit?

please dont point me to other theads to read... i have read so much in the past 2-3 days my head is about to exploded..... i'm just looking for GOOD advice and striaght answers. and place to puchace what i need for a group of great people that have been around the block.

 

First off, 350 block and 305 heads makes a high compression 350 not a 327. Bore and stroke equal displacement. As far as the pushrods, that will be determined later in the build. 500 dollars is a non existant build budget, it wont make it a 1/4 of the way.

 

If the engine is running good and you want to keep the tpi, you should just change out the pan gasket and be done with it. I have seen people do this without pulling the engine. Unless you're dead set on doing a swap, I would probably do that. Sort of the old if it ain't broke don't fix it thing.

 

I wouldn't go into the project with a $500 budget. Be honest about how much you have and how much you can spend. If that means waiting, its probably the right descison.

 

yeah it can be done for 500 bucks but not quickly or easily, yes 305 heads fit a 350 and everything else for that matter except the pistons. i know the oil pan can be changed with the motor in the car but you'll have to search on how, i think you unbolt the motor mounts and jack the motor up untill the trans hits the tunnel and have at it.

i would sugest build up the 305 instead of swaping or save up some more money first