Dick & Matt at Firm Feel have always given me the best of service. I've had 3 of his power boxes, one with the Stage 2 upgrade & two stage 3's. The stage 3 upgrade in my bro's 69 Hemi Charger made it feel as precise as his 08 SRT8 Superbee Charger. On a 70 Hemi Challenger I had a few yrs ago, header clearance was an issue, so I sent Dick pics & he clearanced the side of the Stage 2 box I ordered & even clear coated it for me.
You can't go wrong with Firm Feel's awesome customer service & quality.