Thread: 350 gurus, attn, need skilled advice

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ok i have an engine i thought was somthing special and its not, im looking for the cheapest but best setup to get together for a chevy s10, i have a complete block and heads and i also have a assembled set of heads from a 305, heres the info:

block:
casting i have is 3970010
partial vin i assume is 18s300861
also found on block:
vo607chc
40 gm
f 6 8
010 s
s
going from the stamp on front of engine to get V0607CHC makes it a flint june 7th
year rpo ci appl vin hp bbls body
1973 CHC 307 tur hydro, Calif NB2 115 2 F B X
1975 CHC 350 m/t, h/p T L82 205 4 Vette
1976 CHC 350 m/t, h/p X L82 210 4 Vette
1980 CHC 350 auto trans. L - - full size
and going by the casting on driver rear bellhousing flange 3970010 which is closest so far, i have searched quite a bit but cant find a 3978010 or 3970910 etc
casting cid yr mains appl
3970010 302 69 4 Z-28 Camaro
3970010 327 69 2 Trucks and industrial
3970010 350 69-80 2 or 4

btw it is a 2 bolt main
crank is 3932442
dipsticks on the drvr side
looked up the crank: 1969-85 3932442 305,350 cast large two in 1979-82 267
======================================
350 heads:
3986339 71' 307/350 74cc chamber
and other numbers:
gm 16
00nv4
c271

==================================
305 heads i have:
14014416...80-86...305..........1.84"/1.5" valves, 58cc chambers

========================

i emailed mortec.com here is what they said:
The block casting number is 3970010.

Yours is a 1978 model 350/170hp originally installed in a Camaro with a
T-350 and a four barrel Quadrajet carb.

The 1971 model low performance heads have been swapped on to this motor.

ED
MorTec



so, what to do? what to do?

The engine is the same as thousands of 350's. I would use the 305 heads in this situation. ONLY, because they will have no-lead compatible seats, where the 350 heads would cost you well over $300.00 just to get usable. I very seldom use the 305's because the port "window" is smaller and you lose top end. You will find your S-truck to be a budget tire fryer with the 305 heads. A re-ring type engine kit, HD timing set, new oil pump and a mild hydraulic cam and lifters. Budget, power and reliable. What more could you want?

yea thats what i was thinking but i didnt even think about lead or unleaded fuel, with the 305 heads, could i just have them ported to gain some power and maybe just re seated without replacing anything?

also the block seems pretty fresh and would still only be a temp engine pretty much, what about just the real basics like oil pump and timing set and a cam made for the block/head combo and a after market manifold and 4 bbl 600cfm
with no emisions and a distributor i have thats got the coil in it,
and i can find some stock type exuast manifolds.

any idea what kinda power id be looking at for this? with a th350 behind it..

heres a pic of the dist i have

Originally posted by techinspector1
Be advised that with a stock bore 350, 58 cc heads, 10 cc gaskets, 4 cc's in the eyebrows and 4 cc's in the deck (nominal 0.020" piston crown to deck), your static compression ratio will be 10.43:1 How are you gonna run on pump gas with iron heads at this c.r. ?????

ok i follow up to 58cc heads and tha comp ration but everything else is a bit greek to me bro, and since that being so why dont you tell me how i CAN run pump gas with the setup, even if i gotta run 92 with a quart of oct boost per 5gal its fine, wont be a daily driver,
but seriously lemme know your side of this bro,

thanks guys for the help

Techinspector knows a lot more than i do but, Me and several of my buddies run as high as 11:1 on pump gas, high test that is and have no detonation problems, im about 11.2:1 and i have only run high test for 2 years now not a problem, however i wouldnt push the situation, put the 305 heads on and be happy, you will have great bottom end but dont expect it to rev to the moon cause it aint gonna happen, one of my friends has a S-10, 350, 305 heads, very cheap rebuild kit, runs high 14s, its very possible to do this, check out powerhouse engine kits for a cheap rebuild kit, 661-861-0167, good luck

cool, thanks for all the input, right now im in a tight spot so im mostly just need to get it running with anything and have it as a simple powerplant to move a vehicle,

btw if any of you guys have some cheap or free even parts i can bolt on id like to toss it together so i can move the truck, i got the block heads and pan, and dist, but need intake carb exuast mani's maybe some peices of downpipes, umm, water pump, radiator, etc, im in central florida thanks again

hey guys! haha, good news i tracked down another set of heads, lemme know what you all think,
333882.....74-80...350/400......76cc chambers

btw i didnt get any off this from a junkyard so i wont be going again, i will if i cant find it online tho,

the guy with the heads also has:
manifolds
radiator
alternator
and a holly 6?0 carb.

and i have a water pump off a 94 4.3 v6 if they are the same???

so i would need an intake and ?????

882 heads are notorious for being cracked!! Have them checked. As for the compression ratio with the 305 heads. In real life, Very, very, few factory chevy 350 blocks come close to pistons .020" down in the block. When I was in the machine shop business, the average was somewhere around .035" . That and a set of Re-ring type gaskets and you just may just touch 10-1 compression. This motor in a light body with a mild cam will run just fine on mid-grade gasolines. Now remember the only reason I reccommended the 305 heads was your limited budget. You will find that the 882's (if not cracked) will need a lot of guide and mill work. Just remember Horsepower costs money, how fast do you wanna go?

Also that is not a Chevy HEI unit!!

its not? so wtf is it? lol i assume that means i need another distributor also

ttt

it also has an extra plug coming off it -probably computer controlld

i dont know either thats why this thread is here, to get answers,