Oh, I thought this sounded awful familiar. (
"Murphy, it's you!"):
https://forum.hptuners.com/showthrea...-converter-kit
More of my thoughts on "truck cams", if you're interested:
https://forum.hptuners.com/showthrea...ce-what-to-get
The 60E is crippled by the super-deep first gear, which spins the reverse drum at insane speeds in 1st - the band then clamps around the outside of that drum to make the 1-2 shift, so that drum has to go from 12,000+ RPM to zero on the 1-2. You can fix that, sorta, with a different gearset that has a lower ratio 1st gear, but that's more than $1000 last time I checked. And if you're spending that much, it'd be stupid not to also do billet shafts at the same time, which is another big stack of money. At that point you've spent enough to buy and build two essentially stock 4L80Es that can handle the same power.