I always hate to guesstimate. As far as I'm concerned it's a 258HP atw car, but I guy I know with exactly the same parts made 427HP atw at 25psi boost. So my 300-325 guesstimate should be close to reality after working out some bugs....

It's a shame these engines weigh as much as they do. The Cossie lump has alot better power to weight ratio. They are hens teeth in the USA.