73 t.q.340 auto # 6319s

Would it be possible to measure the primary bore size?

I was just reading an old thread by Legendary Member "69 Cuda 440". He said the '73 6319S had 1 1/4" 1.250" primary bores while the '72 6139S had 1 3/8' 1.375" primary bores. Weird.

Carter Thermoquads ~ 'More General Information'