Quote Originally Posted by 63LT1Vette View Post
Dave, the dynamic efi looks to be what I wanting to do, But even it reads like I need to change to an 7727 ecm?

BTY I really appreciate you guys for the help.
The 1227727 and 1227730 have identical electronics. The 1227727 is an underhood version of the 1227730. Both 1227727 and 1227730 can be upgraded by Dynamic EFI. I've copied pasted a special note about the 1227727 from the Dynamic website, " Important note for '7727 & '8260 ECM users (under hood version). When ordering let us know that you are using the under hood version of the ECM. A different comm connector cable will be supplied. This is due to the unavailability of the ECM harness terminals. Along with the actual connector shells not having the terminal locations molded for them."

The connectors for the 1227727 can be challenging to find. It might be easier / less expensive to use a 1227730.

There are "Pro's / Con's" to either system Dynamic EFI vs. $12P. The decision on which system to use is ultimately yours.

dave w