What size is the rocker arm stud in a stock LT1 head?

 

3/8" I think


hows your bbc car doing?

 

Joes96z

"What size is the rocker arm stud in a stock LT1 head?"

3/8" rockers are what are used with stock studs. I've never pulled one to check but a number of people have said the head part is actually 7/16".

 

thanks.........big block is on hold for the winter. Need to buy bigger fans

 

Yes, the threading in the head casting is 7/16", while the stock stud width is only 3/8". ARP makes 7/16" studs if you want to step up a size, but you'll need rockers to match.

Any search would have got you an answer quickly.

This isn't Advanced Tech in any way. :-/ (please post in the right forum)