headers for 1969 mach 1
#11
I have no experience with what you are trying to do.  But I do know the Pro Comp stuff is poor quality.  Like most other imported parts, initially they look good.  But the devil is in the details.  Are there any other machine shops that could have rebuilt your cast iron cylinder heads?
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#12
(06-22-2019, 04:47 AM)1969_Mach1 Wrote: I have no experience with what you are trying to do.  But I do know the Pro Comp stuff is poor quality.  Like most other imported parts, initially they look good.  But the devil is in the details.  Are there any other machine shops that could have rebuilt your cast iron cylinder heads?yeah i found one a hundred miles away and he is running 5 months behind but i drop them off today guess i have no choice to wait i sent pictures to AT racing world in Rialto CA they said they would replace them but i would have to pay to return them but i must pay to have them returned which is 250$ because it's after 30 days the header trouble i was having is that some of the bolts are off center and will not screw in to tighten just was wondering is it me or have anyone else had trouble with them the scarry part if i bite the bulliet and send them back will i get the same problem not to mention i had to order the special intake manifold that fits those heads so a refund on the heads because i would still be stuck with a 300$intake that works only on those heads hey thanks for your help
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#13
family I need some help got the mach almost ready to come to life I am in need of some help it came with a fmx transmission but I went with a c4 do any one know which shifter rod i am going to need i have tried a rod it said it was for a 1969 mustang with a c4 transmission but it is not working or does it need to be modified has any one have experience from doing this transmission swap also do any one know what throttle bracket i will need to install a holley hp carb on a a 351 Cleveland 4v engine in a 69 mustang thanks family for your help
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#14
I'm afraid you're kind of in no mans land. The 351 Cleveland wasn't installed in the Mustang until 1970. and while 69 and 70 Mustangs are quite similar. There are some differences. Which leads me to think you are gonna have to modify, or fabricate the parts you need, or dig through an old salvage yard, with some old "Fords", and hope you get lucky. Cause I don't think you're gonna find an off the shelf part, to fit what you've got. Confused Good Luck, wish I could be more help.

JTS
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#15
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.
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#16
(10-06-2019, 08:58 AM)1969_Mach1 Wrote: 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
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