i posted earlier about your peak hp rpm, i was wrong and not considering the lsa. i haven't seen too many 104's. i was looking at an article with a 406 and they tested three different cams at 107, 110, & 113, all peaked tq at 4800, 4900, 5000 in that order, but the hp was reversed 6300, 6200, 6200. looked at one of the cam sites and closest lsa was 106. looks like you have a circle track cam, going to have a narrow power band btw. i think you could do better with cam selection, some of the guys here could help. ask your machinist if the top end has
oil restrictors.