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**truckster** · 02-24-2021, 10:34 PM

I have an L31 Vortec out of a 98 Chevy truck. It had a blockoff plate for the fuel pump, which means it was drilled for a mechanical pump. I did have to change the camshaft to get the fuel pump lobe. And yes, 8 vertical bolts for the intake.

This is a picture of it while it was under construction.

02-24-2021, 10:34 PM	#6
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,798	Re: L31 engine swap questions I have an L31 Vortec out of a 98 Chevy truck. It had a blockoff plate for the fuel pump, which means it was drilled for a mechanical pump. I did have to change the camshaft to get the fuel pump lobe. And yes, 8 vertical bolts for the intake. This is a picture of it while it was under construction. Attached Images __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson