We ran our car in C and D stick with the 327 350 hp. a few years back. I never really got it figured out, but it ran ok. I went 10.80s best. Bill is right, the carb is small and the 275 hp is better ( we ran that too) I would suggest buying a new Holley and send it to Dean Oliver. It is probably cheaper than fighting collectors for junk carbs. The intake is tougher. They are out there, but the intake is a 490 number. The guide NHRA has is a squirrley # that no one can i.d. as an intake. Bob Gipson has a 350 hp in his 65 Vette at times and it is coming around. I went 10.80s in E stick with it. It is not going to be easy or a killer, but it can be ok. Remember, this is a stick only combo. The blue car is Bubka's. I don't know him but there are some on tnis site that have had pictures of it and it looks very nice. Pretty much old school style. Real nice. Never fast, but I don't think that is the game there.
Here is a pic of our car a few years back in C stick. Also, a link of testing Bob Gipson's Corvette. The engine is a test mule for the chassis. It now has a 396 in it. Good luck, Jim.