[Blackbirdws6]

Big costs for the complete kit were the harness (around $800ish), billet timing cover, new coils, PCM, coil brackets and other items to keep it complete. I would be confident if you sourced items used and did a DIY harness, you would be well under $1k.

As Sweet mentioned, if you opti is working for you, no need to switch honestly. I did it primarily for all the reasons he mentioned.

Back when I was just H/C, I never had an issue with the opti or a decent dyno tune. Your mods are still easy enough to get right with a mail order. It's tough to support the cost of switching to 24x IMO.