Making some progress on my 400
SD Performance prepped KRE heads and port matched Torker II. Comp cams roller: .583 int .586 exh 230 duration int 236 duration exh. Harland Sharp 1.5 roller rockers. On the engine stand for break-in it went up to 6500 very quickly without any valve float.
Not sure how to fix the picture. It is good for going uphill.
WFO! Is there any other way?