I did find these, which may work well too, but I have never tried them, and don't know the quality:
https://kmotorperformance.com/shop/h...ude-6an-short/
That listing doesn't list the inlet side size, BUT, the 'long' style for the same applications DOES list the line as 5/16.
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
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1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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