flat tappet to roller with other issues

[baddad457]

All the 5.0 blocks were roller after 88 if I remember right. Baddad can chime in and give you the correct year if he will.

All the blocks after 85 were rollers. Not all had fully formed lifter spyder bolt bosses though. I have one like that here. And not all that had the bosses, had em drilled and tapped for the bolts.