Quote: ... just deciding on what valves to order and cutting the heads for spring cups.
From all the posts about rocker clearance, be sure and get valves long enough to not need +0.050" retainers, or lash caps. If they are a touch long, you can put -0.050" retainers on and that should give even more retainer to rocker clearance.
But if you are going with 1.5" dia springs and a low installed height (1.90"), then it shouldn't be an issue. If you want 1.95-2.00" and/or 1.625" springs, give this attention when buying valves. This is when a race head shop is worth the money to get it right the first time instead of band-aiding the the issue.
