Originally Posted by jmarksdragster
That would be a 9375 1050. If it is a non HP and unmolested, you are in luck. It is the best out of the box 1050 Holley made, the middle/intermediate air bleeds should be open, no brass inserts. Jet it 92 square to start, go up from there. If it slows MPH go back down.
If it is a newer HP 9375, start with 86 square. Be aware that the internal metering is not as good as the older Dominator, and needs a little more work to make it behave. Too much emulsion, and way rich down in the low and mid ranges. If you find it loading up in the burnout and cruising, go up on the intermediate air bleeds. You will probably even be able to remove them, just watch the plugs and jet up as needed.
If someone has worked on it, no way to know what's best without looking at all the passages and doing a little measuring.
Yes mark u r right it has no middle air bleeds they are open.....my friend had it on a 498 bbc and it was jetted 88 front and 89 back......u figure that high of jets our air over here in alberta canada is fairly high good air is we get under 4000 da air..........example would be last weekend best air was 4600 feet with 36% humdity............may we get air around 3000 feet for maybe one meet and then in end of sept in the 3000 feet range