hey guys, currently having a carb'd 383 vortec stroker built for my 86 trans am thats originally a 305TPI car. I was looking into what adjustable fuel pressure regulator to buy and the majority of thirdgen members say the mallory 4309 is the best one.

the problem is that they appear to be discontinued now, is there a second runner up? does anyone have any recommendations? thanks.

 

Mallory was bought out by MSD and they are transitioning to MSD part numbers.

It is now:
https://www.summitracing.com/parts/msd-29387/overview/

Reference:
https://www.summitracing.com/parts/maa-4309

 

See also:
http://documents.msdperformance.com/...d_crossref.pdf

But for whatever reason it doesn't list the 29387 as the new number on the 4309 line. Weird.

 

awesome, thanks for the links. Greatly appreciate it

 

For the cost of a little brazing/painting and a cap screw you can make your stock regulator adjustable. Of course, if the pressure is within reason you can always leave it alone and adjust the injector constant in the program.

 

switching to carb and leaving the tpi pump in the tank so the stock regulator on the rail won't work

 

Thanks for the clarification.