86 Brc 351W XLT HO, had rebuilt 2 yrs ago. Was looking for low to mid torque, installed msd box & Dist, fast EX 2.0 never could get it to run RIGHT. Efi is back in it's coffin running one wire dist. Running ok but compression 78 - 92psi on all cyls?? Pulled all plugs, loosened 1 & 2 piston rockers comp 150 & 150 ? Running roller cam and lifters?