the 1992 to 1995 OBD1 setup is the best to have for ease of setup and running / in my Mag l have headers a bigger cam 1.7 rockers a throttle body spacer and the MAP modification [ see links below ] all this on a fresh Mopar performance 380 horse 5.9 long block and l,m pumping close to 500 horse

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No one is programming OBD 1 ECMs. Not sure they ever did, they just bought the mopar performance ECMs back in the day.
96 up OBD 2 are better and the way people usually go if its a really hairy set up.
OBD 1 for magnums should handle a small cam upgrade, but you didnt specify. Mopar performance used a cam as part of their power package on the 92-95 5.2- cam, ECM, headers, and all that got you 24 horsepower for 1200 bucks (in 1995).

If i were you I would use the 93 stuff, understand the 93 5.9 ECMS are RARE and already 30 years old, and swap the heads since they are the first wear point in the engine and use the smallest cam Hughes (or others) offers or a regrind copying the cam MP offered in 95 era

this shows what was offered with explanations

Pardon Our Interruption...

 

Thanks DodgeBoys and Jerseybud for your input. I am new to the magnum world. I found the best doner truck that would easily swap to my early ramcharger. Did not consider or even know about OBD1 / OBD2 ECM until I started looking at engine upgrades. As stated, the doner is a 1993, W250 low mile ex-government truck with 5.9L and NV4500. I'm doing a complete swap, engine, trans, axels, steering, wiring. I thought since I had the engine out and I need to fix the plenum, replace timing gear, and water pump I would look into a cam upgrade as well. I did purchase a set of PIE EQ level 1 heads just to get a better flowing head than factory. I will look at all the links provided however many, many folks are telling me that any major upgrades and especially a cam upgrade may throw the computer for a loop and it will not run very well? At this point I may fix the plenum, throw on the heads and call it a day. Don't want to miss the opportunity to upgrade cam while I have the engine accessible but if I cannot program the OBD1 then I think I am stuck. Again, will read the resources provided. Thanks again for your excellent advice and input.

 

Considering how ambitious this project is to start with and how much power you're gaining just from the Magnum swap, I recommend keeping the Magnum stock for now.

After it's together and operating correctly, then look into upgrading.

 

No one is programming OBD 1 ECMs. Not sure they ever did, they just bought the mopar performance ECMs back in the day.
96 up OBD 2 are better and the way people usually go if its a really hairy set up.
OBD 1 for magnums should handle a small cam upgrade, but you didnt specify. Mopar performance used a cam as part of their power package on the 92-95 5.2- cam, ECM, headers, and all that got you 24 horsepower for 1200 bucks (in 1995).

If i were you I would use the 93 stuff, understand the 93 5.9 ECMS are RARE and already 30 years old, and swap the heads since they are the first wear point in the engine and use the smallest cam Hughes (or others) offers or a regrind copying the cam MP offered in 95 era

this shows what was offered with explanations

Pardon Our Interruption...

Its decision time. Again, I appreciate all your guidance. Working on my 1993 W250 5.9 with EQ Stage 1 heads. Want to go with the Hughes Air Gap F1 (only because I can't find a Mopar M1). Will be keeping the OBD1 and stock MPFI. Want a cam upgrade and I am ok with the $380 price tag if it will get me 20-30 more HP. People I talk to say I need a cam with high vacuum. Hughes offers the SER0814ALN-14 (SB HYD RLR CAM 208/214 -114ºLSA NEW CORE
LONG SNOUT & DRILLED FOR OILING WITH .327"/"333" LOBE LIFT) Not much of a cam but they state that it will work with stock OBD1. Does Comp or other manufactures make a cam that you personally know has been used with successfully with the OBD!? Thanks in advance for your thoughts.

 

Its decision time. Again, I appreciate all your guidance. Working on my 1993 W250 5.9 with EQ Stage 1 heads. Want to go with the Hughes Air Gap F1 (only because I can't find a Mopar M1). Will be keeping the OBD1 and stock MPFI. Want a cam upgrade and I am ok with the $380 price tag if it will get me 20-30 more HP. People I talk to say I need a cam with high vacuum. Hughes offers the SER0814ALN-14 (SB HYD RLR CAM 208/214 -114ºLSA NEW CORE
LONG SNOUT & DRILLED FOR OILING WITH .327"/"333" LOBE LIFT) Not much of a cam but they state that it will work with stock OBD1. Does Comp or other manufactures make a cam that you personally know has been used with successfully with the OBD!? Thanks in advance for your thoughts.

I’ve seen a few cams on summit that are compatible. I’ve seen posts of guys running cams in TBI set ups but I’m no expert.

 

Considering magnums have 1.6 ratio rockers, so 1.6 times .327 and .333 gets you .523 and .532, thats alot of cam. So much that you need to machine valve guides for that much lift. So too much for OBD 1