Got the little stock bore/stock stroke 318 magnum running a few weeks ago and I have to say that Racer Brown builds the best cams out there, very happy and snappy engine.
Engine Specs:
-Stock pistons flipped w/ stock rods & crank
-Hydraulic roller .565/.565 232-232 @ .050 with a 106 LSA
-Mild home ported magnum heads with stock valve sizes
-Hughes Magnum Springs (P/N HUG 1199)
-Mild ported Professional Products Chinagap intake
-Custom built 900 cfm Thermoquad built by the TQ Guru Ken Manley in Canada
-Will get long tube headers when it goes into the '75 Duster
(P.S. I only ran it for the minute and 16 seconds of the video so no harm done with no radiator setup