Not only are the head gaskets different between the 235/261,as mentioned above,ie additional steam holes on the 261 between the siamesed cyl bores,so are the Torque Sequences for the Head Bolts!
If you,re gonna do it you,re self,
Pay Attention to that!
Regards,
steve sr.

Last edited by steve sr; 02/16/2013 10:21 PM. Reason: spelling/clarity