92 silverado engine upgrades

i just purchased a second silverado 350 tbi with the nv4500 trans ( might be a 3500) i always get it mixed up

my other silverado is the same except it has a tbi to tpi swap on it

im going to use this new truck to tow my twin turbo car to the track in vegas and also out to the salt flats to race instead of just driving the camaro there since either trip is 600+ miles round trip

my first thoughts were to do the tpi swap with the lt1 cam

but i dont wanna really do that , im going to assume the 92 tbi engine has swirl port heads , i havent pulled a valve cover to verify casting number yet

my only gripe with the truck is it falls on its face around 3,200 rpms and thats without towing anything , anything under that its great

im thinking maybe something a lil larger on the cam to shift power up just a lil bit , the bb 454 tbi swap and maybe an edelbrock manifold with th e carb to tbi adapter plate and a set of heeaders

if this was a truck u were going to tow with which way would u go with it
maybe even a cam recomendation

btw gears are out of the question speed limits out here are 80mph on the highway and in the truck i will cruise at 75-80 , while towin id obviously go a lil slower then that