Take a guess where the bottle neck is!

Took my 70 to the track last October. Best time was a 14.34 @ 94 mph with a 2.2ish 60 foot. I was driving on Arizonian 235/70/15 street tires (yeah, truck tires) at 35 psi. The thing that got me was the engine fell on its face at 5K. So I'm thinking the bottleneck might be the carb, but I don't know for sure. Engine is a .030 360 with a Barry Grant Road Demon 625 on a Edelbrock Torker II intake (that seeps coolant), stock valve J heads (springs are matched to the cam), Comp cam 268XE (iirc) .471 int .480 exh, 224 duration 106 center line installed @ 105 degrees, KB HP116 pistons 10:1 compression (est), stock oiling system, Carter mechanical pump, stock fuel lines. I have a 650 DP that I can rebuild with a 750 body, and a NIB Edelbrock Air-gap intake on the shelf. The cam is rated to 6K iirc, and I doubt I'm at the limits of the heads just yet. So that leaves me looking at the carb, I have the tune spot on according to the plugs, so I'm guessing its an airflow problem.

Thoughts?