[oldskoolecono]

hey group i pulled the heads off my motor...the block has no visible casting numbers......but the heads have a casting number D80E...im not sure which windsor they came off of ...a 302 or a 351...any info would help.....thanx russ,barrie

[5.0TailpipeHumP]

heres a link http://www.actionsalvage.com/cylheadsford.asp 302

[The Greek]

Stock 302, 289 heads have ths smaller head bolt holes for the 7/16 in. head bolts. Stock 351 heads have larger head bolt holes for the 1/2 in. head bolt. ---Chuck

[cutmesomeslack]

what engine did the 302 heads with bigger spark plugs come on?