7045562 1975 Pontiac 455

[mcx]

...picked this one up today, pretty nice condition. If someone could provide the factory original jetting  it would be appreciated. Thank you.

[Kenth]

Rochester made 7045562 #66 jets, 40J primary jets, secondary rods stamped DB #7047806, 1/2 turn preload on airvalve spring and #7029922 power piston spring.

Carter Mfd 7045562 has #67 primary jets and 41J rods. Also i have found Carter uses .034" idle tubes (Roch. .038") and .060" upper idle airbleeds (Roch. .068").

HTH

[mcx]

Thanks Kent
I’m breaking it all down now...It’s a Carter version with the casting “ warts” flaws in the secondary main body....this is the first time I have come across the aneroid with a flexible bellow and rod in the front cup, every other one has been the plastic plug and rod..the bellow looks to be in decent shape by appearances. I guess it’s a copper flex material?   Michael

[mcx]

This is what I have measured:
Airhorn
Main bleed  .069
Upper idle bleed  .0635
Secondary POE  ?
Main body
Idle tubes .035
IDCR .0465
Lower idle  bleed  .067
Lower Main bleed .0410
Base plate
Idle mixture holes .093
Idle air  bypass  .1100

[mcx]

More info:
Primary jets 67
Primary rods 42J
Secondary rods missing
Hanger missing