eratic skipping bbc

[mvvic]

:idea: i need help? bbc roller cam all good. 425 hp @rear on dyno. started pre ignighting overheating etc changed dist plug wires, comp good ,timing chain valve degrees good lost 100 hp thought it was electrical but ive changed it all fuel air ratio on dyno is perfect??? im stumped andtired of spending money , even my experts are clueless vic :(

[zipper06]

Have you pulled a compression check on the engine, could have a gasket blown between the cylinders.

Zip.

[davis419b]

What kind of ignition box do you have on it?