Actually most any wp is fine even rebuilt ones have a good track record. The MP one is good but pricey. Weld on an anticav plate. Get an 8 blade one and support the front shaft in front of the cross & press the vanes in the rear more forward till you have ~.040" clearance to the body and can mill the tim cover so you end up w .040" clearance from the anti cav plate to the flat (factor in your gasket thickness & adj bolt/washer length). Makes the pump FAR more efficient. Inside the tim cover 2 main water passages is a slight casting mold about halfway in on each one that can b removed w a whizzer in 15 seconds and use the smallest WP pulley you can fit. Have more but is the block bare or almost together