looks like im in the minority here but i went Pro M EFI over Holley. I did the full package with COP and Crank sensor. My car has never run so good. Install, start, and drive.
I will say Chris of Pro M is somewhat hard to work with but if you can look past his odd personally he does offer a great quality product and very informative with knowledge.
Ive used a Tweecer R/T, SCT Chip, DFI stand-alone, and now the Pro M EFI and its never run this good before. I am extremely happy with my decission. It does bother me with him being a one man band, but he answered all my emails, monday-friday and saturday and sunday as well. Being built with the oem quality, i hope the system keeps my car running for a long time. Best thing is, i can change anything parts on the car, start it and drive it.
Ill be installing the Flex Fuel sensor as well so i can run E85. Cant wait for that.
Only thing i will say, if you were to buy the Pro M EFI, i would opt out of the Innovate Wideband and order a Zeitronix wideband instead. I have the Innovate and althrough i have not had any issues with it yet, just about everyone ive talked to online has and have switched to the Zeitronix with no issues.