Man it's expensive when you must pay someone to do stuff for you.
I did 455 oldsmobile swaps into things years ago and stuck one in a buddies truck.
Here is a video of someone else with a 455 olds powered Chevy truck.
Would have been nice to have an early Oldsmobile Truck to stick one of my many 455's into.
I just post this because I usually had 300 in the engine and an easy swap.
Hope your cam swap goes well.
Ran the 455 olds in the SS Taylor jet boat with the low end marine cam back in the day.
It was a beast.