57 truck fuel pedal brake pedal issue

[57FleetsideC4]

Hi, I am finishing a 57 chevy pickup with a 6.0/4L80E DBW and just got the seat back (Stock Bench) and installed. I have a problem with the brake and gas pedal to high. I am using the stock 2005 GMC pedal I shaped to get it away from the tunnel and the brake pedal is a conversion to use the booster/master on the firewall. Doe any company make maybe a adjustable fuel pedal or anyone run into this? Thank You Steve