383 Flat top pistons.

I've been looking into the Speed Pro forged flat top pistons for my 383. I'll have 2.14 intake and 1.81 exhaust valves. My question is, since the pistons do not have valve reliefs, will I need a piston with valve reliefs or should I be fine? If it will be ok, what ball park figure would max lift be on a cam?

Plans are max 450hp with reworked 906 cylinder heads.

Thanks
*Rogue
Author: admin