vSOLID
3.50-4.50in² MIN
118-127cc chamber
320-415cc runner
2.250-2.350 valve
1.85-1.880 exhaust

Pro-Filer makes one of the only SOLID BBC castings available.  This can be ported and sized to unlimited use. Please call to discuss your needs.  Hand ported version has made 1900hp w/whipple.