I have a '68 289/302 not sure which one. the block says 302 the heads say 289. I tore the block down and had it cleaned up. Now I wondering what to do with the heads. Do I hot tank and reseal the stock 289(?) heads or to I use my heads from my '93 5.0 with 60 K on them. Can I even use my '93 heads with the non-roller cam and rockers?