454 is not a good truck motor.
They do not make torq.
They are an RPM motor; meaning as long as you keep the RPM's up they will pull. Trucks prefer to operate at lower RPM's.
The auto trans will help hide this flaw. But still when you get in a bind, it will take loads of throttle to get it moving.
And will be a fuel pig.
The 402 was a torq motor. but is balanced opposite the 454.
One is internal balanced the other is external.
Anyway you need to break out the vintage truck manual and see what motors were used in trucks. 366 and such that make big torq at lower RPM's.
Well that is what i know about that.