D Dart package ?

I believe a gentleman named John Clapp owned & raced a 66 D Dart in the stock classes in AHRA here in Texas back in the late 60' & into the late 70's. I met him at one of the races at the old Eastex drag strip & he rebuilt a set of 67-68 273 heads that I had in exchange for 2 sets earlier casting 66 273 heads. Unfortunately, I lost contact with him in the 80's when he retired from Yellow Cab as their service manager.