Quite often guys ask questions about what carb works, So I thought I would share my experience.
Disclaimer : this are my own findings and based on a stock 292 , FORDOMATIC. With pertronix ignitor 3, timing at around 12 initial, total at 36-38 and all in by 2700 rpm. B manifold port matched, 1/2" 4 hole spacer for the carb. twin exhaust through Smithys. And bum dyno.

1. Started with a 600 Holley auto choke. Fine, worked ok . I think in the end I settled on 62 jets, 10 " P/valve,  blue pump cam , 31 squirter , black secondary spring  .  Good point seemed to always start no problems after sitting a few weeks. The 600 now sits on my 74 Cuda. changed settings of course, It works really well on that.

2. Went to a 450 Holley auto choke, supplied and rebuilt by Phil at RPM ind.  with that one I settled on 58 jets, 8.5 P/valve, green pump cam, 31 squirter, brown secondary spring. Good point.. None really was about the same as the 600, the only thing is that it seemed to dry out because of the vent in the float bowl.

3. Now on an Edelbrock 600 performer 1406 [the economy one with electric choke] was originally on my Cuda. With this one the stock needles and jets with the heavy 8" springs. I tried the next up rich needles [23] but it felt very much like the Holleys - fat. I have felt a difference with the Edelbrock it seems to have much better transition and though mid range to top end seems stronger, definitely noticeable with the standard needles. It did however have a very very slight of idle flat spot, I just moved the pump jet to the nearest hole and bingo all good, I found from a standing start I can floor it and it pulls away clean, slow as slug but clean, the Holleys Mmm just .  Good point, well I guess its the stronger mid range now thats important.. >>> [Also the kick down works better..??]

Because its a Fordomatic they can be a bit of a slug because of the way it works, as we know its really just a two speed. Start of in second gear and a lot of the corners - round-abouts etc your usually driving out in top gear..
 The one thing that has been evident with my car is that it likes a bit fuel straight up, note the "heavy pump cams"   even with the Edelbrock pump.
The Y block and Fordo - doesn't seem to be that fussy I really think that any carb from 390 to 600 CFM works ok, I haven't seen a revelation , just the stronger mid range in Edelbrock I guess.
Hope this helps someone..





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