PREDATOR-Z

224/222 .612/.588 114+2LSA

That is a -5* overlap, Stealthy with the right exhaust, should make 390+ and a shitload of trq if installed properly (Degreed with proper preload)

I run the same on my 6.1L but on a 117 LSA and I'm pumping 450rwhp out of it H/C

This is a Custom grind, Comp Cam

BADSS

iTrader: (7)

I'm about 99% sure LT1 valvesprings will not fit on LS1 heads.

Mike@ZMS

iTrader: (10)

So, if the springs will not fit the heads, can the heads be machined to accept the springs?

BAD2000TA

iTrader: (6)

Get the right springs. You DON'T want to drop a valve! Springs are cheap. Some Comp 918s will be just fine.