You have to realize that some of the TF-2 mods can have unintended consequences for some users. For example, if you shortened the throttle valve, WOT kickdown might not kickdown if the linkage adjustment is iffy.

My oft-repeated advice, make sure that WOT in the engine compartment is WOT at the pedal; have somebody sit in the car and floor the throttle then, from under the hood, push back on the carb lever to make sure it's actually wide open and make sure the trans linkage is close to full back.