as some of you may know i have given up on the 305 and am looking for a 350. heres what i found, 350 4-bolt main. came from 1974 chev truck. freshly rebuilt with all new crank bearings seals, everything new. has performance cam, double rolling timming chain, weiand stealth intake manifold, heads ported and polished with all new valves, lifters etc. has a holley 600 carb. the guy wants $390 or a little less. i would buy this in an instant only for the fact that it came from a 1974 vehicle, with very low hp. the guy says it has around 270 now which isn't too bad i guess. i want to know can i put my tuned port injection on this motor, after porting all of it and i want to know what kind of diff. a new set of heads can do with the motor. i am aiming closer to 350hp in my car with new motor, so can this one make that much?

 

That's way too cheap. The carb alone costs about $300, and the intake another $150. So you are paying for those 2 things and getting the whole motor for free. Remember the adage about buying used stuff: "If it sounds too good to be true, it is".

I can also tell you, with that combo, 270 HP is optimistic. The stock 74 350 motor put out about 180 HP. If it has the same heads and the same kind of pistons it came with, and a street cam, it will be lucky to crack 250 HP.

Apart from that, if it is exactly a 74 350, heads and all, the block is fine; you will have 2 issues to deal with though. The oil dipsitck will be on the driver's side and will absolutely not work with the exhaust manifolds in htese cars. One of those flex ones might but I've never tried it. And, the crank is the 2-piece rear main seal design, while your flex plate is for a 1-piece design. You'll have to change that.

The heads are garbage if they are the OE truck ones. Throw them away. They will be 882 or 624 castings, which are low-compression, low-flow smog parts, not HP ones.

Geting 350 HP out of a stock TPI is wildly optimistic too. A stock 350 TPI, with far better heads and cam than the truck motor would have come with, put out around 230 HP. TPI itself is the limiting factor. It's very difficult to get much more than around 300 HP out of it, and even that requires lots of $$$$ and good tuning knowledge.

The short block less cam is a perfetly good foundation to build on; but you need to set a more realistic goal, and find some better heads, and get a TPI-specific cam.

 

If its not high milage I d say its a good start. Did u hear it run???

unrelated:
why is my sig not showing up????

 

there is NO milage since the motor has been rebuilt. no i haven't heard it run because currently its in a warehouse in an industrial area, but he says it used to run perfect before the rebuild but there was a small puff of blue smoke when you'd first start it. this block itself is is mint shape acccording to him, and he said he knows that he is giving it away, he said hes had it long enough. i guess i'll ditch everything on the 305 i have now, except ignition components, but i won't get rid of it, i i'll kleep it in my garage. also, i don't mind buying a new set iof heads and pistons. the guy said it was the stock pistons and stock heads that have been ported and polished. but i am not sure, i might just keep saving and get a new crate engine.

say i got a set of alum heads and some forged pistons and a few other things, about how much hp will it have? keep the replies coming...

 

as far as hp limits, in the scoggin dickey parts catalog, i saw a 350 tpi vortec that made 357 hp, with large tube headers but get this, it makes the hp peak at 42 or 47k rpm, i laghed till i cried..... hmm...... lb9 with lt1 injection? would it work?

 

47k RPM!!!!

Holy shiiit!!!!

OH!!! You mean 4.7K RPM

Just messin' with ya. :sillylol:

AJ