Can't chime in on your exact question of 70 vs 71 but I'll take the opportunity to plug Spectra (the gas tank guys) pumps. I have a lot of cars so I've gone through a lot of fuel pumps. NOS is useless since they've all dried out, usually they fail soon after install. After having poor results with several brands (mostly made in the home of the virus) I tried Spectra, I've installed several in the last few years and everyone fit perfect, looks very OEM and I've had zero issues, perhaps not coincidentally they are made in Canada and the US. Not expensive either.
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My Break Away Squad
1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops)
1969 LeMans (2dr & 4dr Hardtop and a Cvt)
1969 LeMans Safari 2 seat Wagon
1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop)
1969 Catalina (3 Cvt’s & a 2dr hardtop)
1969 Ventura 2 Seat Wagon
1969 Executive 4dr Sedan
1969 Bonnie Cvt
1969 Bonnie 3 Seat Wagon (2 of them)
1969 Bonnie Brougham (4dr Hardtop & Cvt)
1969 Grand Prix SJ (2 of them)
1969 2+2 2dr Hardtop (Canadian model)
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