sqzbox

I recently aquired a 75 350 4 bolt 4 barrel out of a 3/4 ton 4/wheeler. After doing a search on the engine code, all I can find is what I already know (read above) + the hp (165 net). I was really looking for the comp. ratio, valve size, torque rating, and maybe the valve lift, and duration of the cam.
The engine was smog exempt in the truck and came with the quadrajet carb and HEI. If someone has a book with the #'s or can give me another web site I sure would appreciate it SQZBOX. Code is V019TBX, engine #06X134519

sofakingdom

iTrader: (1)

I don't know what you think this "smog exempt" might mean; but the truth of the matter is, it just means that it didn't have a cat and maybe not AIR. The motor itself is pretty much the same as any other 70s smogger 350.

The cam will be the old 929. 194/204 @.050, .390"/.410".

The heads will be typical smogger junk. Probably the usual stock 350 valve sizes 1.94"/1.5". Maybe smaller, being a truck motor. 76cc chambers, very poor exhaust port, probably lightweight castings such as 882, 993, 0r 624. They should be melted down as scrap, as soon as possible if not sooner.

It came with about 8.2:1 compression, because of the huge chambers, and the pistons having about a 15cc dish. Meaning, the pistons need to go in the trash too.

The only parts that are any better than any other 79s smogger 350 are the block which probably has 4-bolt main caps installed on it, for what little that's worth; the crank, which might be steel instead of cast iron; and the rods, which might be one of the upgraded ones, probably "O" rods. Tear it idown, verify those things and keep them if they are the better stuff, and throw away the pistons, heads, cam, intake, and about every other piece of it.

The oil pan probably will not fit one of these cars by the way; get one for a 79s Camaro 350. That will drop right in.

sqzbox

What I ment by smog exempt was no cat's. Sorry bout' that ! I've also noticed that there isn't any EGR system on the intake, just the basic quad w/thermoustatic choke control. The 75 engine came in a 76 truck so I figured it's an early 76 truck built in 75. With 8:2:1 comp. I guess regular gas would work but was wondering if my 305 heads would help any in that department.
Wouldn't the pan from the 305 fit? I wasn't planing on a big buildup, just the basic carb, intake, ign, headder swap. I figured the 350 would respond to these mod's with better results that anything I could do to the 305 for alot less money. Thanks for the info! SQZBOX.

1991L98G92

V = Flint (Engine)

019 - There is a number missing

01 January

9? can't be day

19 could be the 19th which could mean 10 being October

TBX = 1970 350 van & bus 255HP 4BBL C-10,20,2500,3500,3200
TBX = 1979 350 conv. cab, a/t Eng code L LS9 155HP 4BBL K-10 to 2500

These came from this site but there could be others

Chevy Engine Codes

Randy82WS7

lol 1991 just beat me to it


1970 TBX 350 van & bus 255 4 C-10,20,2500,3500,3200
1979 TBX 350 conv. cab, a/t L LS9 155 4 K-10 to 2500


check your date casting codes again, it is a 70 or a 79

70 would be no EGR

79 can be no EGR only if it was in a truck with GVW above 8500lbs

that would be a 3/4 or 1 ton or above
the block date casting code is on the back bellhousing ledge of the block it will be a letter followed by 1 or 2 numbers, such as A9 or G79


that will tell you the month and year the block was cast and then youll know if its the 70 or the 79 one

what date casting code is the intake,

hard to say if its original to the engine, being this old,

these were usually not 8.2 CR

it would be 8.0 or 8.5 CR in a truck


normally


thermostatic choke was 79 and older

do you still have the truck the engine came out of ? if so look in the glovebox on the SPId label for the engine RPO code, was probably an LS9 in which was a very common 350 engine in trucks especially

good luck

Sonix

iTrader: (1)

yes. And along with a decent cam. That'll help it out, for not much $$.


wait, 305 TBI heads? well, they suit the truck block I guess....

Vader

I must respectfully disagree. If you take the time to remove an exhaust valve from either end, examine it closely. Throw away the valve, tie a 50' poly line loosely through the exhaust valve port and valve bowl, then take it with you the next time you go fishing in a river with a silt or mud bottom. There is almost no anchor better in a soft river bed, whether it lies flat on the bottom or rolls over so the valves springs dig in to the silt. If you tied the rope loosely enough, you can simply give it a sharp tug to undo it, then pull your expensive poly rope back into the boat without having to struggle with the old head.

You'll have enough heads for two good fishing trips that way.

EDIT: BTW - When you start pulling all that old stuff off there to recycle, look at the area behind the timing chain cover. If you see either the numbers "010" and/or "020" cast into the block, you may have scored a higher tin/nickel alloy casting. Those numbers might also be on the rear face or the block, ahead of the flywheel. The extra nickel wil make a stronger casting, and the tin adds some density and granular stability and better machinabilty. The better alloy castings seem to be more common in truck blocks.

sqzbox

i'M SO STUPID SOMETIMES! I got the code mixed up. It's V0917TXB not tbx.
Oh well, back to the wimpy motor huh?

1991L98G92

It is a 4" bore and a 4 bolt main. That's definite potential.

sqzbox

That's what I figure. That 350 is going to respond to whatever I do to it!
Why not work with the 8 somtin' to 1 and burn reg? I don't need a fire breathin' monster under the hood I've already been there many times already.
It's so easy to mod a normaly asperated non comp. engine at a lot less money
I can't help myself. My son has an edelbrock intake and carb sitting on the bench and told me to take it along with a mallory dizzy and coil. It looks like I might get away with just buying the exaust. all that and 3300 lbs ought to run well on the street. with the wimpy bottom end cam hooked to the 700R4 with 273's might be able to keep the MPG too.