I started my fresh 426 Hemi yesterday for the first time and I have a couple problems.

First: 66 426 Hemi: now a 484 with Callies stroker crank, JE pistons, Manley rods. Crane H-244/362-2S-14 Cam (.568/.572)
I am using stock heads, stock intake and (2) Carter 500cfm carbs.
Using a Mallory 140gph pump with regulator. 1/2 line from pump to regulator, 3/8 from regulator to carbs. Also a 3/8 return line to the tank.
Car is a 67 Coronet with 4-speed and dana with 4.10 gears.

Problems:

1) When pump is on it seems to make a knocking sound. I get fuel delivery though. The fuel gauge (small cheapo one off the regulator) bounces. I have it set I think to around 3PSI so it bounces 1-3.5 Is the regulator bad? should it make that knocking sound and bounce the gauge? Is the fuel set too low?

2) When I was breaking the cam in the headers started to glow red hot so I shut it down. This is after about 5 min of run time. Is this because of a lean condition?

So maybe I am answering my own questions, but do you guys think the 500 carbs are too small? fuel pump too small? regulator bad and set too low?

Other than that and some valve cover leaks it started up good and runs strong.

Thanks for reading and your help.