headers for 1969 mach 1

[rango-jr]

For the throttle cable bracket, you are going to have modify one for an original 4 barrel 351C or 351W motor.  There is not a factory bracket that will work correctly with universal Holley carbs.  You might be able to find an aftermarket billet aluminum bracket that will work.  NPD use to sell a stainless steel bracket for your application but have discontinued it.

For the shifter rod.  Other than C4 trans originally were installed behind a 302, I don't know why it doesn't fit.  In stock forms the FMX is a stronger transmission than the C4.  I don't know why the FMX was never popular for performance use.  They are tough and can take quite a bit of abuse.

Do you have a Holley street HP carb with linkage for the trans kick down rod or an HP carb without that linkage?  Just something to consider.

I am not using the kick down linkage just a 750 holley hp on a holley strip dominator aluminum intake