install items manifolds efi heads cams access nitrous water pumps access ... shocks qwikdata index small-block ford edelbrock/glidden cnc 190 ford heads # ... 51309 cylinder heads tota l cnc s/b ford ultimate street performance edelbrock/ ... cnc 170 heads are ideal for a warmed up 302 331 or 347 engine for a warmed up 351w ... steel valves edelbrock/glidden cnc 170 ford chamber size intake port size valve ... .57 n/a 51319 edelbrock/glidden cnc 190 ford 60cc 190cc 2.02 1.57 n/a 51309 notes ... only will not accept rail rockers 289-302 v8s require head bolt bushings #9680 ... see chart on pages 168-169 for complete specs match with head gasket sets on page 48 ... new edelbrock/glidden cnc 170 and 190 ford heads have fully cnc ported 60cc ... fully cnc ported chambers and ports s/b ford competition ultra high-performance 1. ...