Got a 72 chevelle with a 355 sbc 4 bolt block, good cast crank, Holley 650 DP, Holley 300-36 dual plane manidold, TH-400, and a 10 bolt with 4.11 gears, headers are 1 5/8" primaries. Car will use 28"X10" slicks at the track. Want to run a solid flat tappet camshaft. What heads and camshaft and converter do you think would be able to get this heavy car in the high 12's. Thanks.

AFR 180's and whatver you want to deal with as far as idle quality,etc.Something in 230-240ish range @ .050,110 LSA and a convertor thats in 3500 flash range..JMHO

I agree with Mr 4 speed. The AFRs are hard to beat. I think mid-12s are in easy reach. I would run a 10 inch converter. Alot of folks on this link have had good luck with Harolds cams and you should do a search to see what else people have run similiar to your setup. I would try for about 10-1 compression and run a good exhaust.

I placed an order for a set of AFR 180's last week for my 355. I'm going with a Comp solid, XS262S, 224/230 @ .050, .477/.488 lift. I'm going with the mild cam because I like my 2000 stall and 3.42's for street driving. I'm hoping for something like 13.25 @102mph in my rig, weighs about 3850 with driver. You can probably go 12's with a little more cam, gear, and converter than I'm using, like Chris says, but heads are the key. Based on a lot of research, I'm going with the AFR180's even though they are a little pricey.

You didn't mention what compression you are dealing with.

Sorry 10.5 to 10.75 compression.