what are these heads and are they decent bbc heads
oldandtired
11-19-2011, 07:18 AM
what are these heads and are they decent bbc heads
3964291 are 69 to 70 109cc closed chamber rectangular heads.
396/402/427/454/with 13/16 or 5/8 spark plug (gasket or tapered).
Hard to get good flow around the valves with the "bathtub" chamber.
well got motor home and they are 3964292 bbc heads just wondering if they are any better and what they are