Bill, talk to Marty at KRC. For $400, they will get you a MPC that's been slightly re-programmed to work in your truck. They have someone that custom programs the chips for them.
I know someone in CT with a 2000 4x4 (also no MPC that I know of), and he's now running a 408 (360 + 4" stoker crank), rather not-mild cam, Mopar M1 2bbl intake, custom throttle-body, with relatively low compression, and pushing well over 300hp, and uses a custom chip from them.
He had a blower on it, but decided he didn't need THAT much engine (was near 400 with the blower).
Correction, the truck also has a Roe Air/Fuel controller in it, and the home-page is at:
http://www.moparforme.com/
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Aaron Wood
'00 Ram 1500 RC SB 360 V8, Auto
3" Rancho Perf. Lift, 315/75R16 Goodyear MTRs
Reunel Front Bumper