fit corvette d-port aluminum angle plug heads 121 will not fit with turbo 400 unless ... /2 and later lo-boy 126 some factory heads do not have bolt hole in end holes must ... proper seal 127 will not fit angle plug heads 128 this header requires installation ... engines 150 will fit on angle plug heads except 3/4 reach plug applications 151 ... duty ho and edelbrock performer rpm heads only 152 this header is exempted from ... 1965-76 163 will only fit 16 bolt f.e cylinderheads with the top four exhaust bolt ... holes in line will not seal properly on heads with the end upper bolts lower than the ... will not fit with edelbrock angle plug heads 186 will not fit 168 tooth flywheel/ ... bolt on the popular aftermarket b-s heads however because the exhaust port ... centerline on these heads is 5/8 higher and 3/8 out from the ...