Thanks Tim.
Well the casting # 3837012 makes it a 55-57.
Can´t say if it came from a truck or car, but it has the drilled lifter gallery (came without lifters and cam gear when I bought it), had a tag of a canadien Pontiac Garage/Shop on the side and the main caps say "made in Canada". So that`s why I belive it`s of a canadian Pontiac car.
I got a solid Bulldog cam and solid lifters for it. I think after all the Information I got here it`s safe to bolt on a bypass filter.
Frank
Frank
