Mild Built 340 Timing/tuning help?

Do you know if the TRW pistons are above deck? Also, what head gasket are you running? Even with the 64 cc Edelbrock chambers, if it's the low compression 340 pistons that are below deck and you're running a 4.18 bore Felpro gasket that 8.5:1 compression or less is a good possibility.