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Ol' Ron · 05-13-2017, 06:46 PM

Tod
Yes the 24 stud block is a derived from the 21 stud block because of it increase in bore size. the stud at the center of the lower cylinder bore was too close to the bore. so it was re moved and 2 studs were installed. If you put a 21 stud head on the 24 stud block most of the bolts/studs will fit.
All you have to d is make provisions for this stud. Then users can drill and tap it.Problem solved. Several years ago I cutup a block and looked inside, very interesting. I have a junk block you can have, for just this purpose. So does most people.

05-13-2017, 06:46 PM	#125
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: New block Tod Yes the 24 stud block is a derived from the 21 stud block because of it increase in bore size. the stud at the center of the lower cylinder bore was too close to the bore. so it was re moved and 2 studs were installed. If you put a 21 stud head on the 24 stud block most of the bolts/studs will fit. All you have to d is make provisions for this stud. Then users can drill and tap it.Problem solved. Several years ago I cutup a block and looked inside, very interesting. I have a junk block you can have, for just this purpose. So does most people.