Hi, following some valve guide issues last year I bought 2 good used cylinder heads for my 496 Mag Ho off eBay.
Having only just got round to fitting them some 10 months latter I have found that everything seems the same except at each end of the head where the 2 shorter (mid sized) head bolts go are not shorter on the used heads that I have bought. I cant see anything online showing a different variant of head showing all long bolts without the 2 shorter ones.

Does anyone know any more about this as I am worried that I may have incorrect heads despite everything else looking the same?

Thanks
Simon

Marked in red is the difference between the two heads on the end 2 bolts that would normally be the middle length head bolt. It’s recessed on my old 496 heads but level with the rest on the new head.

Thanks for the replies gents.

Keith sounds pretty conclusive so I have ordered some more bolts. Hoped I might be able to get them in the UK but its a nightmare getting 496 stuff over here, so ordered a set from Summit Racing.

Billk, I still would be interested in what you make of the casting #. I am pretty sure there was no casting numbers but I will check again later.

Cheers Simon

Have just seen what I was missing in the picture the casting numbers are on the intake ports, will post them later

Bill if you have any info from those casting numbers it would be great.

Cheers
simon