'starting to catch on' .. now *that* is funny!!
Heck of a lot more Drag Strips to run on in the '60's than there are now.
Top Fuel wasn't an all Hemi show by any means ..Olds, Chevy, Pontiac ..heck some even ran Allison's

Don Garlits started makin history when he bolted a blower on a 392 Hemi and went for it in the original Swamp Rat.
I beleive Shirley was a Top Fuel digger driver before she got into Funny cars and became known as 'Cha-Cha'
The match races tween 'the Mongoose' and 'the Snake' were legendary.
All decades ago.
-Frank aka GE