Quote: I think most budget performance rebuilds are based on using Hypereutectic flat top pistons because of the lower cost. Keith Black and speed pro have several choices, but the speed pro pistons do not have valve reliefs, and may sit further below the deck (low compression), so the KB pistons will usually be you best choice in the affordable priced pistons.
The Speedpros do not have valve reliefs but they have a taller CH than the KB pistons, the bad thing about the KB's is their CANYON like valve trough at 5cc(6cc??, one needs to use the KB400 with the DOME to get anything that resembles compression into a 383.
