Ported by Bennett Racing,dual bolt pattern exhaust(std and diagonal),double roller springs,studs and guideplates.Was on my 400W in a 69 Mach 1.Can email pics.Removed for CNC Victor heads.Great shape,no damage or repairs,all bolt holes/threads good.I gave 600.00 for porting,valve job.2.05 intake,1.60 exhaust..800.00+shipping. PM email for pics..