I have a stock single barrel Holly carb on my 71 Dart with Slant 6.
I did a 30 over bore and RV cam. What size Jet do you recommend
to replace the stock jet with?

Any advice will be appreciated.


Darren

There were 2 different Holley 1 barrels available...

The original Holley 1920 for your car with the front hung float bowl would do great with a #57 or #58...

If it's a later Holley 1945 with the dual floats inside the carb body...install a #61 and reset all the linkage per the rebuild kit instructions as a 1976 Car.

-D.Idiot

I agree with the 57 58 size jets for the fron hung float holley. I run bigger but here in Bristol tn. with headers and good exhaust it likes it.








Jess

For a little more consistent economy I run a #56 with 2.5" exhaust. It bumps the mileage on short 4 to 8 mile hops from 20 to 22.5 mpg. On trips it jumps way up there.....25 mpg plus if I don't drive too aggressively!
That is comparing it to a #57.

_________________
Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG