Measure the length of the head bolts you need and go to either the Dorman or Pioneer open stock head bolt listings. They're simply 1/2"-13 Grade 8 head bolts, nothing fancy about them. You might consider using Grade 8 SAE flat washers under the bolt heads. Bolts for a 54-62 235 will work, also.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!