Eh, thats a 2 sides question for me since I am more like you where I would just build the one I want and shoot for the best of both worlds. Lets look at it if I couldnt do that.

I would have to see exactly what would have to be modified and how much of a gain one was over the other. If it were simple modifications, then i would buy the higher HP. If the HP were close say within 20hp....i would be inclined to buy the better fitting one and make up the difference elsewhere. You can see what I mean by a catch 22. If the Manifold made a good deal more power and the seller disclosed all the details of what needs to be altered to prepare me for when its installed.....I would be buying the more powerful manifold hands down. Now if i were required to put the battery in the truck, like my setup would require with your N/A design then i would take the better fitting. Takign weight away from the wheels that needs traction is worse than any HP loss to me.

The difference with me is that i know more than the average member so whatever questions I dont ask the seller...arent really his concern but if I were a 19 year old kid who only had minimal tools, seller is morally obligated to explain exactly what needs to be modfied. Otherwise he has a customer who cant use the part and is forced to ask for a refund or sell it.

Custom parts in my opinion need to explained when the sale is made. Its like me selling my Turbo manifold telling some kid it botls right up no hassels when i know very well you must run the waterline design i have and move the fans ect ect.

On the topic of the neon head.....has anyone tested it to show it flows like the Eclipse head? Being 180* out i wonder how many differences there are in casting flaws that make it really comparable. We have already proven the cam profile is different since the cams are not interchangeable. I wish when people would buy these parts they would at least take the Time to dyno it alone and give you the feedback so that the info can be shared. They dont even have to do it for you, do it for everyone else.

The turbo manifold you made is very similer to the ones available for the 4g63 (which i like) only our head design sucks so bad the manifold sits too low. I think a 45* bend in there mid runner would solve that. Relocating the battery sucks because we have FWD cars......what good does it do to put the battery in the rear of the car.