there is a lot of talk about valve clearance with 2399 cuz their valve relief is small, but it is a stock replacement piston for the LS6. has block been decked? heads milled? larger than 2.19 intake valves? (2.06 is 1/8th smaller) from what i hear it is not so much the depth of the valve relief as the diameter valve the relief is made for. The factory solid lifter cam in the LS6 had a duration of 242 degrees @.050 and a lift of .520/.520 on a 108 LSA. 454 HO 211/230 Duration @.050, .510/.540 Lift, LSA 112 i THINK you are OK. i think the clearance issues are with 2.25 or 2.3 valves and drag strip durations...

UPDATE. I found a set of 088's for a great deal so I bought them. Good bye peanut butters. The 088's are off of a 502 mag efi. I just need to figure out a cam for it now. I am thinking the 500efi cam but I am worried about revert from the exhaust. I do not have the manifolds any more (long story) so I still need exhaust but I will be using captains call. suggestions

500 efi specs. http://www.offshoreonly.com/forums/g...cam-specs.html you don't wanna go back to stock merc exhaust with that cam. just got me a set of 088's too, with fact intake... now i need pistons.

I'm seeing another call to Bob Madiera.