what is your jet size?
I’m unsure as Rochester doesn’t stamp the sizes on the outside of the jets like Holley does, but a .067 numbered drill bit fits loosely through it. And the next size .070 bit is too big.
Does that help?
what is your jet size?
I added 44k primary rods, 71 jets in the Holley reman and 73 in the factory 403 carb. Both ran awful on my 350. I was going to suggest drilling holes in the primary plates but you don't half as anything. Man, 69 rods are huge, the jets must be around a 90.
Secondary rods should be letters. I am betting 37K primary rods and that jet size sounds right. I added a thread I plug and notched the APT adjuster, it made a difference at the track, turns out and mileage as well, turns in.
Secondary jets are fixed and only one size. Usually the rule is the jet should be .030" larger than the primary metering rods. The DP secondary rod is very lean, most are CV rods with various hangers, H through M for hangers, lower letter raises the rod more. Here is the Qjet secondary chart.
http://tech.oldsgmail.com/carb_sec_rods.php
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