Slant 6 cylinder Aluminium engine

OK here comes a pic of the engine, wich was installed in the car about -95.
So the engine is older than the car.
Its have a bigger bore and hi comp pistons and the cylinder head is ported and have bigger valves.and there is an 276 degres camshaft, holley 390 , and an Offenhauser 4port mainfold, and heeders slighty modified cause it has power stering.

Thans again for the help. Michael