johnnyboy

iTrader: (3)

so i found a 5.7 vortec in a '98 3/4 ton silverado and it's going to be going into my '82 t/a, just wondering about a couple of things, first does anybody know if it's a 4 bolt main block? and secondly what are the chances that i can use a mechanical fuel pump?
i had put vortec heads on my 305, but i spun a bearing. so i have the proper intake and most other things taken care of, are there any small things that need to be changed or modified? like i'm pretty sure i need to use my old oil pan. what about accessories?

johnnyboy

iTrader: (3)

anybody?

five7kid

iTrader: (14)

I'll know a lot more in a month, because I'll be helping my brother replace the engine in his '99 Suburban.

I'm not sure which Vortec engines got 4-bolt main. They did get roller lifters, though.

I doubt the block will be machined for the fuel pump rod. Slight chance it will be, but more than likely it will not.

Fast355

iTrader: (2)

Vortec trucks that were 8600 lbs GVW and above generally had 4 bolt mains.

My 1997 Vortec Express was machined for the fuel pump from the factory and had a block-off plate as factory equipment. The GM crate engine that is currently in it was not machined nor is the GM TBI crate engine.

johnnyboy

iTrader: (3)

okay, well the truck the motor is currently in was a cab on frame truck, no bed or box or anything, it was previously used by pepsi for a delivery vehicle. so i'm thinking it had a big aluminum box on the back of it.