Originally Posted by 69novassguy
thanks the timing is good and the carb is tuned and ive been going all over asking around and im being told that the 750 might be too much carb for it, but i have the carb cal kit from edelbrock so im wondering which rods and jets to use....ive been looking at the manual and the graphs and charts are helpful but ive never had to do this before...
First be sure the float level is correct and that there's no leakage past the needle and seat from trash or wear.
Then if it's still too rich, baseline the carb to factory specs. Still too rich? The tables show what changes to make to lean it out but you need to know if it's rich at light throttle cruise or under a load, or what.
The 750 is
large for a mild 350 sbc, but it'll run fine if it's tuned in correctly because the secondaries open on an "as needed" basis- not like a double pumper, where the secondaries will open up if you floor it regardless of what the engine wants. The primaries are larger than a 600, but that's not so much of a problem that it will always run too rich. What you may notice is a bit less crispness to the off idle response due to the larger primaries- which work to slow the air/fuel velocity a bit.
It will help to know the specs of the engine- cam specs, what type intake, the timing as already mentioned, the compression, etc. Everything that's known about it will help.
You said the timing is OK. What are the numbers associated w/it (initial, total, all in by rpm, vacuum advance amount)?