Match Race ~ 1970 'Duster 340' vs. 1969 Mustang 'Mach 1' 351W
1969 351W {290 HP}
The C90ZF Autolite {4300 Series} Carburetor {470 CFM} did the 351W no favors at high RPM's.
Throttle Bores = 1.437" {Primary} x 1.563" {Secondary}
That Carburetor was no match against the 340's Carter AVS {630 CFM}.