I answer to the question about Q-jets, I was running a edelbrock 600 on my 250, with comp cams 260 H, 307 flat tops +.030, complete MSD ign including distributor, headwork with stainless proflo valves 1.94&1.60, early 60s 292 exhaust manifold with 38" of 2 1/2 pipe to a dyna max muffler with 2 2 1/4 tail pipes then to back of car. I am running a heated sensor autometer air fuel gage. The mixture was suprising no matter what jets & rods I installed it ran rich unless under full throttle. A friend suggested that I install a Small Q Jet that was used on 1985 Astro vans with a V6 and some small caddies. Installed after a stock rebuild and saw my a/f gage start to read something other than rich. To make this story short after a little adjusting this engine starts and runs like efi and I have increased milage 5- 6 mpg over the edelbrock, I would never have belived this if I hadn't done it myself. I was always an AFB/Eldebrock fan but on my six the Q-jet is much better, I "think" that my power level has also increased (Seat of your pants feel) this engine is also tied to a 700R4 with a 2400 convertor. My friend explained it and it made sense when you think about it "the Q-jet I am talking about was the last carb useb by GM before they switched to efi. NOTE I left the electric fuel sol. unhooked on his advice. Also this carb has an electric choke on it.
Big Bill
