I swear I'm not having anyone do my dirty work here I've looked up these numbers and it appears to be your standard TH350 then the couple of numbers on the passenger side got me scratching just a tad. I know the PO has done some engine upgrades and wasn't afraid to dig in so just wondering about this trans and that 066 number. There is a chrome pan on this trans and it's slightly different than my other 72 so without getting to far ahead of my self as I plan to lower myself back to earth with the results. That's not the turnpike cruiser number L66 or something like that ?

 

Pic of number drivers side