I hope this is the correct forum, but I am sure some of you can help.
I have a 1948 3600 that I have owned for about 6 yrs. It can with the current 250-6, with Fenton headers, and an Offy intake and a 600 cfm carb. Otherwise the engine is stock. I switched a TH350 for a 200R4 and it retains the original 3/4 ton rear. With overdrive, lock up torque converter and tall 265/70/15 tires I can run about 65 mph at 2200 rpm.
I know that the carb is too big for the engine. My mechanic (I am not the skillz guy) has jetted the carb as far as he can and overall it runs "ok". I have resisted the urge to throw money at the carb situation, but I really think a smaller (390 cfm)carb would help the engine run better. I realize this may be a general question, but is it worth $500+ labor to address the carb? Will I really get better response/mileage/etc from the change?
What say y'all?
