ATK 5.9 Magnum crate motor horse power

66fyssh said
If you're interested in building one, here's a Hot Rod magazine article.

How to Add 129hp to a 5.9l Mopar Magnum - Engine Buldup - Hot Rod Network

I just picked up a low mileage 5.9 and am getting ready to build it. For now just intake, carb, headers, torque converter and timing set. Should get it to around 320 hp. Headers are the biggest expense since it's going into a 66 Barracuda. Hopefully I'll do it for around $2k.

@Keith Mopar update for you and others.

The engine is done and in. Runs like a raped ape compared to the tired 273 Commando!

But...as all builds go I more than doubled my budget.:BangHead: I stripped the engine and took it to a machine shop for a hone, new rings and bearings, polished crank and hot tank the block, and had him install crank and pistons.

I got a black Friday deal on Edelbrock 2.02 heads and Doug's headers (not a lot, but every little bit helps). Sent the OE cam to Oregon Cam Grinding for a regrind, .216/.224, .517 on a 110. Air Gap intake and bought a Edelbrock 750 off a member here. Went with a Carter electric fuel pump. Got a 9.5" converter from PTC.

I kept the v-belt setup and painted it factory 66 engine red.

So far I've put 750 miles on it. I'm loving it, but I kinda miss the old 273. But not really cause this thing pulls and pulls. I'm running 3:55 gears but I have an open diff so I'm saving coin for a Sur-Grip. And...I'm going to need wider than 215 tires!!

It was my first build. If I had it to do over, I would have done the rings and bearings myself also.