The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Exhaust manifold swap

**mattfranklin** · 09-16-2020, 11:28 AM

Correct me if I'm wrong, but doesn't the L31 come standard with a roller cam?
The 2000 rpm, 20 minutes was more to break in a flat tappet cam.

09-16-2020, 11:28 AM	#2
mattfranklin Senior Member Join Date: Dec 2011 Location: Moraga, CA Posts: 801	Re: Exhaust manifold swap - need help to solve a gap Correct me if I'm wrong, but doesn't the L31 come standard with a roller cam? The 2000 rpm, 20 minutes was more to break in a flat tappet cam. __________________ (Very) Slow-Going Build Thread: Stock 1970 Short Step with Stock 1970 LT-1 http://67-72chevytrucks.com/vboard/s...d.php?t=567340