ok i tried doing a search on google for the horsepower ratings of these 2 350's but i couldn't find them so i was hopin someone here could help me.

I have 2 engines to choose from for 1k each, 1 being a remanufactured 1969 350 Chevelle 4 bbl engine, 4 bolt main or

a 1972 350 chevelle 4 bbl engine. 4 bolt main.

which should i go for? are both of them poop and i would be better off going for a different one? thanks

also, another question i need to ask is i will be pulling the 305 TBI from my 91 camaro, is there anything i need to get to have this dropped in? the blocks come with carbs, so what do i need for that conversion?

 

My guess would be go with the '69 block. 72 the horsepower ratings dropped I believe.. a '69 350 is rated at 350HP... but it's more.. it's under-rated..

 

Save your $1k and buy a new crate motor from GM. You get a warranty and piece of mind knowing that your beloved so called "chevelle" motor does not suddenly go ford on you.

 

I've heard of to many horry stories about so called rebuilt engines.

 

The block is pretty much the same. A block is a block is a block is a block, except for the difference between roller and non-roller, which isn't an issue there.

The factory 4-bolt caps don't matter. They're not designed for racing or even street high-performance type stress; really only for truck motor type use. Since that's where such a block came from, not from any Chevelle, even if that's what it's been in lately, or what it's being sold as a replacement for.

The block will retain no memory of the sheet metal, or even fiberglass, that it has been wrapped in at some point in its life.

The "ratings" of the motor that came in some car unrelated to the truck that the motor came from, or for taht matter even for the truck that they were originally part of, don't matter. Those motors are not connected in any way except ad copy with those cars. For that kind of price, what it'll be is a .060" over, no torque plate, cast 12cc pistons .045" in the hole, 929 cam, 882 or 624 heads, steaming pile of smogger crap. No matter what romantic-sounding tale comes with it about "69 Chevelle".

It's impossible to guess which one is better over the Internet. Things that matter aren't mentioned in your post; like, which one has less core shift in the casting, which one had more care applied to its machine work, which one has the better hone on the cyl walls, which one had the rear main seal put together better so it doesn't leak, and so on. 69 vs 72, 4-bolt, and Chevelle are totally irrelevant.

They're both too cheap to be any good. You get, AT BEST, what you pay for; and nowhere is that more true than with rebuilt engines over the counter. You pay the least, you get ..... well I'll let you figure out what you get.

Blocks don't come with carbs. No rebuilt motor does. Or, for that matter, intakes or exhaust manifolds.

To use them with your TBI, you just put your TBI intake on it (you'll probably have to elongate the center 2 bolt holes on each side), and bolt your TBI on top. It'll run better if you go to the junkyard and get the TBI off of a 350 truck or Caprice, and the chip out of its ECM. You'll need an early-model flywheel or flex plate; get the one for a 83-85 Camaro/Firebird V8. Prepare to be underwhelmed. Expect cooling problems, oil burning, leaks, and short life; not to mention, very low power output.

I expect you can probably figure out, I don't think it's a good deal. You'll be disappointed with them.