Punch 'em in the junk. Unless you're surpassing 450 hp or towing 5000+ lbs, 2 bolt mains are plenty.And I know alot of people are criticizing me for adding power to an L31 2 bolt main but besides the point.
Yes. There are people out there spending $300+ on cams no bigger than putting 1.6s on a Vortec cam. My recommendation is to either call your favorite cam company and fork over $300 for a cam in the .480"-.500" lift range, or you can spend $120 on a set of stamped 1.6 self-aligning rockers and hit .442/.457 lift. The 1.6s will probably play nice with stock springs. If you spend the $300 on a larger cam, you'll be spending another $200 on LS2 springs and Comp Cams 787-16 retainers to accomodate >.480" lift.Can I put in 1.6 rocker arms with my factory cam and still make more hp
Any which way you'll need a tune.