Sorry i forgot the bore diameter's

283 & 307 - 3.8745 to 3.8775in
305 - 3.7350 to 3.7385in
350 - 3.9995 to 4.0025in
396, 400 & 402 - 4.1246 to 4.1274in
454 - 4.2495 to 4.2525in (4.2500 to 4.2507 for 1991 models)

if ya need anything else let me know and ill look it up