I have a 97 Ram 1500, I took a 1975 360 bored .040 over, srp pistons, comp cam and timing chain, 2.02-1.60 stainless vavles, and it's all internaly balanced. I used the timing chain cover off the 97 and has all the original brakets off the truck on the front of the motor. I put the MP M1 replacement intake on top with a 866 cfm TB. It's running with the stock injectors and pcm. It has a specter breather and pacesitter long tube headers with 3" pipe all the way out the back with 40 series flowmasters. I have a msd and coil wired through the pcm. The engine light is on and it's saying it's missing on all 8 holes, lol The cam maybe just a little big for the pcm at a idle. My problem is the pcm rev limiter is set for 5500 The cam is good till 6000 and would like to get rid of or just up the limiter to 6200. I have looked at the pcm chips, and MP pcms but none of them talk about the rev limiter. Which way should I go? I see you guy talking about the piggy back system and was woundering how everyone likes it and if it's worth the money. It runs realy weel now but I'm sure it could run better. Whats you'r opinons?