Just trying to get an idea of where my power might be peaking and where i would shift.

Heads flow with a 195cc intake runner

.100 64.2 47.8
.200 132.8 92.3
.300 188.6 134.5
.400 237.7 160.0
.500 267.1 179.1
.550 277.8 186.9
.600 279.0 191.7

LTs, 3" ypipe to an open borla.

cam is

230/236/112

.544/.555 on 1.6 rockers

motor is a 383

 

i am also at a mile above sea level, or more in some cases.

 

Well since mine peaked at around 6400 in a 350, you should peak lower with a 383. Say low 6k.

Thats my guess.