Why tear it down? If it runs good, clean it up and drop it in the truck.
It'll make that thing go down the road just fine.

It might be a big barn door of a truck....but I've never been a fan of plain cruisers. It already has a touch of pro street concerning the look. We've welded many of the seams shut to smooth out the look, changed the bed up a bit and added some fat back fenders and things of that nature.

I want it to make a runner out of it also. A solid 450 horsepower build is what Id like, which is a good 200 more horsepower than this thing stock(the 413). When we first put it together(the truck), a fairly healthy small block chevy drivetrian was transplanted in it, but now its time to do it right with big block mopar power and I definitely dont wanna go backwards in performance and leave this mild motorhome engine as is.

I guess I bet bored quickly

Based on what you'd have to do to upgrade that 413, I suggest using it as-is, but add an S472.

roots blown would be the only way Id go if I considered that route. I know its old school and low tech by todays standards, but it would fit this truck perfect. I'll have to get some pics up over the weekend or something to show you guys whats going on with it.

This thing would probably only see the race track enough times to get a good baseline on how it performs. Other than that...street driving is where its at. And I sure know 12's or 13's isnt super fast by todays standards....but lemme tell you in this particular straight axle old truck....its flat scary! Plenty fast enough to have fun with, but also enjoy as a driver.

Then again, you never know. We're building this one for my old man, who has had plenty of real fast strip cars over the years(all mopars or close cousins.....one was a pro street gremlin he built in the garage!). Right now he is happy with a good 12 second ish runner, but he might get the itch to try and build something thats gonna run down my car since Im faster than him right now haha.