Looking for some advice on jet sizing- Thermoquad 6139
Bewy you are somewhat correct! I remember on nmy mates 253 Holden years ago with a 600 holley carb , to get it to run properly I had to increase the jet size .
The only thing I could come up with is the smaller motor did not have enough power to pull the fuel through the jets, not enough vacuum signal so needed a larger jet size than my 265 Hemi engine!