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Discussion in 'Engine Topic' started by BeefTip, Dec 11, 2010.
eww...what do you have to do to make them support a bigger spring?
If you look at the top there's a sticky that will tell you anything you want to know about Vortec heads, and engines they came on.
A 3/4 ton or bigger truck will have 4 bolt mains.
But yes ANY 96 and newer Vortec 5.7L is a good purchase.
oem roller, 4 bolt, like the mod said read the sticky at top of the engine topic page.
I lucked out and got a 350 block out of a '90 Heavy 3/4 ton. Roller cam provisions, hole for the fuel pump rod, and 4 bolt main caps.
14093638...350...87-95...2 or 4...Roller or flat tappet cam, one-piece rear seal
This block was also used a lot in the "F" and "Y" bodies. There's a rumor going around that Corvettes got 4 bolt mains. I don't know if that's true or not, but I wouldn't count on it. The 4 bolts were mainly used in heavy duty applications.
thanks guys, i just saw the sticky up top!
One other thing to check - some came with a mechanical fuel pump boss, some didn't. Even those that had it weren't all drilled, double check that - IF you're going to be running a mechanical fuel pump.
good tip! However, at this time I would probably just use my electric fuel pump thats already setup on the car.
I never knew this, thought it was only on the bbc engines.