The bolt clearances change when Clifford Intakes, Dutra Exhausts and wrapped headers are put into the mix. Some of the bolt clearance goes away.
I have never done it, but I would think that installing a Hyper Pac intake in chassis would be a pain.
I think he's just got a stock 1bbl intake and exhaust manifold. It just seems odd to me that the choke pocket and the intake to exhaust port would be that close to each other to where you couldn't get a straight extension in there. The only thing I can think is maybe there's excess casting on the choke pocket that's blocking the path?
