bmfIROC-Z

iTrader: (1)

im buying a 350 out of a 76 suburban off craigslist to put in my 88 silverado and i was wondering if anybody could tell me how much hp/tq this engine came with?thanks.

dimented24x7

iTrader: (2)

If its still in good shape, it should be comprable to your current L05. The only major difference will probably be the heads (L05 has swirl ports), and the 2-piece RMS (LO5 should have a 1-piece RMS). Most of this you probably already know, but keep in mind that you will need to mod or replace your stock intake and change out the flex plate to one for a pre-87 engine. Also note that you will also want to check the length of the 4 center bolts in the intake as two of them will get close to the pushrods. If your not careful, you can bend a pushrod if the bolts are too long. IIRC, I recall the stock intake bolts being an issue when I installed my old goodwrench years ago.

Before you put it in, it would probably be a good idea to rebuild or replace the heads and maybe replace the flat tappet cam + lifters. Theyre probably not in real good shape after such a long time.

InfernalVortex

iTrader: (4)

Agreed, just make sure you go through the cam break-in procedure with the proper break in additives.

Shadow Z

iTrader: (2)

If it's a high mileage engine with worn out rings, and the crapy 462624 casting heads with 76cc chambers, along with a stock carburetor that has clogged jets? A hot 150 overall Horsepower, but the good news is, it'll be a Torque monster down low.

The 70's 454's only came with an amazing 365 FT.-LBS. and 245 overall Horsepower. Those 350 Suburban blocks are horrible, unless built right. I have about the same exact engine, and if it weren't for my Edelbrock carb, Edelbrock intake manifold, longtube headers, and accel ignition, I probably wouldn't even see 200 Horsepower.

Soon, soon.. I have hopes of getting a 10.49:1 compression forged Eagle 383 rotating assembly in, with 6" 4340 H beams rated up to 1,400 Horsepower, along with the decent Dart Pro 1's. That's only $2,400, not including labour! It's horrible to be short of your goals, reminds me of a song by CKY. Closeeee yet farrrr.

bmfIROC-Z

iTrader: (1)

oh yeah i know about them damn center intake bolts lol,but im not gonna put the tbi stuff on the 76 engine ,everything is on the 76 and it runs great so im gonna keep it carbed(not a big fan of tbi) and just throw it in the truck for now just so its driveable,and then at income tax im gonna pull it and rebuild it with this stuff :this rebuild kit: http://www.summitracing.com/parts/SU...0/?image=large ,a baby cam,edelbrock performer intake,and a good 600 holley dp. what do guys think it'll have for hp then?im shootin for 275-300 @ the flywheel with the rebuild,its not a hot rod but i do want a little power.

Shadow Z

iTrader: (2)

It really depends on a lot of factors. I skimmed over that rebuild kit and didn't see a compression ratio mentioned. It's a very tough call, but with maybe 9:1 compression and the parts you mentioned, 250 Horses? That rebuild kit seems to be a completely stock spec rebuild kit, for what year 350's, I do not know. My guess is it's not designed to make much over 250, as there weren't many that made over 250 Horsepower.

Then again, I may be way off, it may make 200 Horsepower, it may make 300, there's hardly any decent specs mentioned for that kit. If you're aiming for 275-300 Horsepower, why not just go the extra bit, and just a rotating assembly from Eagle?

I don't know, money may be an issue, but it's not much more than that rebuild kit you posted the link to. Eagle specialty products makes great stuff.

Item # B13403L153

Speed Pro hypereutectic -10.0cc inverted dome
ring size: 5/64" 5/64" 3/16" standard gap

3.4800" stroke standard cast steel

5.700" standard I-Beam

Clevite CB663P rod bearings
Clevite MS909P main bearings

All of that for a whole $648.75, can't beat it. You'll have a new, far stronger crankshaft to go along.

The crankshaft and rods are rated up to 500 Horsepower, incase you ever decide you want to spray or boost a little, you'll have room to experiement.

bmfIROC-Z

iTrader: (1)

i would think with the flat top pistons it should be at the very least 9:1 compression,but 250 hp wouldnt be to bad for the price,like i said before this isnt my hot rod (thats the iroc LOL)so im not lookin to put a bunch of money into it,maybe later,but for now just a stock rebuild with a little higher compression will suffice,i just want it to be dependable and to have a little more power than what it came stock with.

InfernalVortex

iTrader: (4)

Well even with flat tops you've still got those huge chamber smogger heads on there. Probably still in the 8:1 range. Get some 64cc heads and it'll go up to the mid 9:1's with flat tops. Depends on head gasket thickness and overbore too, though.

Why are you going to take a block that old and just throw stock sized pistons and rings back in it? I dont see the point of spending all the money for new rotating assembly parts when all the bores are out of round.

Pierced_Zombie

lol here i was hopin some one was throwin it in a third gen XD ive got a 94 suburban i was thinkin of pullin the 350 out of >.>

Shadow Z

iTrader: (2)

I'm about 95% sure my Camaro has a 350 out of a 70's - 80's Suburban, if that makes you happy.

I seriously need to get around to getting my block casting number.

Pierced_Zombie

lmao i guess, i was told it would be a low compression 350 and should probly change the heads >.>

SSC

Theres 2 versions of the 350 in 70's trucks depending on vin check number. Theres a low output and a higher output engine. It's been a long time and the cobwebs in the old brain are getting thicker I just cant remember what the check number is. Of course I have a book but if I go back upstairs before the wife wakes up to look for it.... I dont want to die today. lol. Anyway hp and tq its comparable either way the lower output engine is on par with a TBI 350 due to age you wont notice a difference either ho or not. Ive used the older engines in newer trucks just modified the intake to go backwards. Trust me its not worth swapping heads for the swirl ports unless the heads on the donor engine are shot. Good thing is you dont have to deal with the stock exh manifolds and the dip stick truck manfiolds work with either right hand or left hand dipstick tubes. Just make sure to swap the water pump and use the correct flywheel/flexplate and call it good.

bmfIROC-Z

iTrader: (1)

it dosen't really matter, it'll have more power than it came stock with,and because it'll only set me back about $300 for a full rebuild, i already have a fast car so i dont need another one,and i dont see the point in spending an extra $400 to bore it just to put bigger pistons in it,when the stock out of round bores will get me through just fine after honing and ridge reaming if needed.