In Reply to: Re: Head Bolts/Studs posted by TheOldHokie on April 27, 2022 at 11:20:15:
I'm not sure about the changeover, but guessed it coincided with the side mounted distributor. My concern on threads is using a tap as a chaser in the block where studs were used and causing a possible leak potential. Like you note that if the bolts were rolled it probably is not an issue. Lots of misinformation out there I just picked it up in a flathead rebuild book somewhere. John Smith advised me on using 10 ft-lb on the studs rather than torquing to the thread size spec.