I recently did a Rick's tank in the GTO, and one thing I didn't care for was they could not provide a drawing or pics of the sump. All I got when talking to them on the phone was 'no one has ever complained about fuel delivery problems'.
Rock Valley is transparent, and will provide you with the plans even. You can use those plans to make any mods you want.
The 2nd gen F tank I had them do was for a blown app, and I used Fuel Safe sump, with 'wings/diverters', and one way check valves into the sump. I had them do 5/8 NTP fittings on it too for feed and drain. Also have them do mount pads for an external pump and filters.
https://fuelsafe.com/collections/mot...livery-systems
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
http://forums.maxperformanceinc.com/...d.php?t=760624
1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
https://forums.maxperformanceinc.com...ght=procharger
Theme Song:
http://www.youtube.com/watch?v=7zKAS...ature=youtu.be