I just picked up a 1973 Duster 340, with a 1971 360, 904 trans and 8.25 rear. I haven't checked yet, but I think the gears are 3.91's or 4.10's. The engine at some point had a fairly beefy cam installed and I'm not sure about the stall speed on the converter. My question is, the engine has an older Holley 600 cfm carb. It needs a rebuild, but I have a practically brand new Holley 4160 750 vacuum secondary laying around. Will the 750 be too much carb? Should I think about a new 650?
Second question, I have been thinking of upgrading to an MSD billet distributor with a 6AL box and coil. Is the change to a new ignition system, worth the investment?