Purple Shaft 280/280 cam

if you convinced you want to run a purple cam in you combo id run the 268/272 450/455 lift 110 lsa.jmo.if your looking for a lopey idle and still keeping it streetable go with a consevative grind with a narrow lsa,like an isky 270 mega (270/270 465/465 108 lsa) or maybe a comp 262XE.ive run the iskys with good results.never personally run the comp extreme energy grinds,but have heard good things about them.