40 DCOE FILETIME=[2FA75480:01C12283]

I want to head up and see about purchasing the 40 DCOE if it is
applicable to the 1275. My SpeedPro Series book recommends a 40 for the
948 and 1098 and a 45 for the 1275. I believe I am safe in the
assumption that this application is for "built" engines. I have a pretty
much stock engine.
Will the 40 DCOE perform as well at the stock SU's. Is it worth the
changeover??
If someone has the time to answer, I would like to head up to the store
soon as they close at 2 pm. TIA Brad