If your engine does have window mains, depends on what you're doing. I had a window main 403 with cam, intake, headers running pretty strong, and never had any problems. Recall driving a stock 80' 350 Delta 88 with really tall axle gearing, and thing was a real dog. Think you've got your work cut out for you, getting that thing to breath a little better.
Last edited by DeltaPace77; June 12th, 2012 at 07:26 PM.