I have an EB 5LT (XR8 according to the ecu) in my 66 xr ute. Have spent a zillion dollars on a custom tank with holley retro module and 95% new lines and fittings. The only thing not replaced was the regulator and fuel rails?also injectors. Since getting it back on the road I Have found its surging even under a little bit of load. This is at worse when cold and almost gone when warmed.. Has anyone got some sugestions that may point to the problem or is it a merry go round of testing and replacing. Any help or advice is appreciated.