I dont consider this engine an R&D experiment. They offer a pumpgas 622 with Brodix heads on their site. They also have a story on their site about building a set of PSO heads for a customer with a dragster. So they have built engines using World blocks. They have built pumpgas 622's. They have built PSO heads.
PSO headed 632 from MM. Cracked cylinder, loose valve seats, low oil pressure, low cylinder pressure. ..... Now its a door stop....
