You realize that you are talking about an engine that, in perfect condition, only puts out a bit over 110HP? 50HP would be great but you need to do more than a header. If you can add 10 to 15HP to a 114HP engine, however, I think that's pretty significant.....but that's just my opinion.
Yes sir I know and that is the basis of my point. When hp is that low, % yields on gains are far less appealing than bigger engines. I mean, 110/125, really makes little difference to me. Slow is slow so why waste the money?
Again, I am not condemming the idea. I am just saying that the analogy of performance from header appropriate engines do not always go backwards i.e. if you can do it on a 3.6l why not a 2.4? Sure you can but why? The truck was not meant to be fast and even with the new 2.7l in 95/96 which ran the specs to about 145/150 I recall, the truck was slow. Sufficient? Damn right. But so is 110hp for this truck.
You cannot and should not maintain a stock exhaust for a header. First, it defeats the purpose and second, it often times just will not fit. So, now you are at the what, 750-1000 mark for a new exhaust system if you have someone else do it. At least 500 if you have the tools/time to do it?
Just my .02.