ok whats the difference between a 350 truck motor and a 350 car motor? is there anything different internally? like the crank rods pistons? cause i can get a 350 truck motor for about 400 complete. and i wanted to top it off with the holley systemax II kit... what do yall think?

 

truck is more likely to have 4 bolt mains i beleive.
the cam would be different. setup for more low end than high.
but the 350 block is a 350 block

 

Another difference is that cars got roller cams sooner than trucks, so if you get an early 90s or late 80s truck block, it may have a flat tappet cam BUT may also have provisions to be drilled to accept a factory roller system. Make sure you know what you're getting.

 

ok truck motors got roller cams in 1987, and as for four bolt mains, most trucks 3/4 ton or larger had four bolt mains, but all after 1987(smallblock anyway) had roller cams

 

Willing to bet money that trucks after '87 got roller cams?

I bought a 350 4bolt main out of a 90 GMC 3/4 ton and guess what, it has no roller cam. And I know this to be the original engine 'cause I bought the engine from a roofing company. They've had the truck since new and their mechanic has been working there longer than the truck has.

This block does have all the provisions for a roller cam, but did not come with a roller cam.

 

I got the GM Goowrench motor 350 which is basically a truck replacement motor. The cam in it is horrible only power to like 3500 rpms.

 

I got the same engine with the intent to change the heads and cam anyway. I put in a Summit flat tappet cam and TFS heads and the engine runs beautifully.

 

not all got the blocks with the set up for roller cams, I have gone through the bone yard and found a few 87-89 blocks that don't also one of my friends c/k blazer(88) did not have it also. I would say 9 out of 10 do so check the lifter area if you can.

 

V8 truck engines did not get a hydraulic roller until 96. All V8 TBI trucks had flat tappet cams. The blocks have provision for a factory hydraulic roller set up. Some of the earlier blocks are not threaded where the lifter guide retainer mounts but the bosses are there.

 

Just today I replaced the intake gasket on a 89 305 tbi truck and the block does not have provision for a factory hydraulic roller cam. I have yet to see a 90-up V8 tbi truck motor that will not accept a factory hydraulic roller.

Sorry about the error in the above post.

 

Man, mine isn't runnin right at all? What carb you usin?

 

TPI, and it runs like a champ.