1969 S/S AMX DRIVE LINE BUILD:

ENGINE:
390AMC bord .040 over, 9.2:1 c/r, Dual procharger’s with crossram intake, Indy racing head's, 307*Dur.675Lift cam, 2-900Cfm 4bbl Holley TBI's.

EXHAUST:
1-3/4," 1-7/8” headers
Side pipes.

TRANSMISSION:
Stage3 clutch, close ratio 4spd.

DIFF/RATIO:
AMC20 rear-end 4.44:1 gear's.

TIRES/WHEELS:
28X12R15's in the rear.28"tall. TORQUE THRUST D'S 15X8.5.

245/50R15's in the front.25.5"tall. TORQUE THRUST D'S 15X8.5.

ESTIMATED E/T:
9.20’s - 9.40’s.

with the 9.2:1 and dual procharger's what psi boost should i

have to be about a 14.2-14.6:1 compression ratio??