Billet jet plates from Promax ?

[SUPERSTOCKRACER]

like these :icon_cool:

I have those in my Super stock 770 holleys. Very tuneable

 

[66Satellite47]

For you guys that have converted to screw in jets, what size jets are you finding work with the stock type alum manifold? I'm sure depends lots on motor combo, but ball park size #'s. Thanks.

 

[SUPERSTOCKRACER]

For you guys that have converted to screw in jets, what size jets are you finding work with the stock type alum manifold? I'm sure depends lots on motor combo, but ball park size #'s. Thanks.

in my hemi 78-80 primary
74-76 secondary
but mine was a dual 4bbl. crossram