It's most likely an 1 1/8" bore. Too big for those Dynalites unless you have Hydraboost. You are probably more in the 15/16 range.


1968 Pro-Touring Dodge Charger
*2011 Optima Ultimate Street Car Challenge Invitee
http://www.popularhotrodding.com/features/1203phr_1968_dodge_charger/index.html