I will be leaving the anciliary front end stuff ( alt, ps pump , serp belt, a/c ) . I am curious about the Injection and ECU , Exhaust , and any other tricks or info. I have heard that the ECU is mapped differently and I don't know if I should grab the ECU or use the old 3.9 stuff. Is one or the other detrimental or higher performance or ??

Any one used headers on this set up ? Is there a benefit? I thought I might freshen up any hardware and then do a cloth header wrap to cut under hood heat a little ... anyone?

I understand that I will have to remove the manifold anyway to get to hardware on the back side.... Should I throw a cam in there since I am part way to it anyway? Any upgrade cams that don't take away from reliability or mileage ?

If there is anything I am missing or comment or info that may help - your help is greatly appreciated.

Thanks in advance
KJ

BTW - I am not looking for a barn burner - just reliability and if there is a reasonable gain available I will take it as long as the trade off is not too extreme.