It's easy to better the stock camshaft,send the stock cam to Tim @ Bullet cams for a regrind. There are lot's of flat tappets that would crush the hyd roller if you want to go that direction. Tim @ Bullet can give you good advice if you give him all the details. This stock bottom end 360 magnum runs low 12's and high 10's @123mph with a small shot and will soon pick up with a new Bullet camshaft. Hope to see 11.80's and 10.40's with a regrind.