Hold up there, cowboy - no need to be rude. Why focus on the EFI when my question was about fitting a '71-'72 tank into a '70?
If you had taken the time to ask for more information, I would have explained that I wanted a stock tank, with the stock venting, so that I can use the Holley in-tank retrofit pump with the integrated regulator. With that unit, the return is in the tank, so there's no need to plumb a separate return and lets me use the current single fuel line (with up-rated hose, of course).: https://www.holley.com/products/ls_p...r/parts/12-303
. To that, I am planning to use their QuadraJet Sniper system: https://www.holley.com/products/fuel...efi_quadrajet/
These two items let me have EFI which is totally stealthy. The concern about the filler neck angle and length was raised during my inquiry with the product support folks at National Parts Depot. The unit you linked to is actually a Tanks Inc. product - you can tell by the part number. They make nice stuff. But, it wasn't quite what I was looking for. I actually used one of their poly tanks on my '38 Chevy street rod when I put EFI in that.
Hang on there rodeo clown, if you had better explained the big picture, might have helped. I don't need to ask for more information because you are the guy inquiring
, and I or anyone else can only reply to the questions asked - which I did.
I can read, you wanted to use a non-EEC fuel tank from a 1971-72 A-body because you could not find a non-EEC fuel tank for a 1970. Why use a 1971-72 tank when you can use a non-EEC 1970 gas tank? I easily & quickly
found several suppliers for a non-EEC 1970 fuel tank - period. So that takes care of your fitment question and using a different year tank and
the follow up question of "Does anyone know of any issues with filler neck length or angle?" If you have a 1970 GTO and the replacement 20-gallon gas tank is listed as for a 1970 GTO, it would be easy enough to figure that your question has been answered on both fronts.
With regards to EFI, no doubt there are a number of options, but seeing I am not a psychic and a very poor mind reader, it would make sense to me that IF I were going to install a new tank with such a system that I would purchase the matching tank and supporting mechanical items that are known to be compatible and work in harmony versus cobbling together some older technology. Your way is not how I would do it, but then again, a factory Q-jet is the only way I do it.
And, if you had done some research, you would also know the benefit of having a return line up front at the engine that goes back to the tank to help with vapor lock, boil over, and even hard starts instead of simply regurgitating gas back into the tank where the effects of engine/under hood temps are not encountered. Even when using an electric fuel pump to supplement the mechanical fuel pumps used on these older cars, you want a return line for the purposes already given. EFI can benefit from the return line just as any carb can. My friends 1992 Corvette set-up in his '70 Camaro has the EFI with its factory 1992 return line outlet plumbed back into the tank. So I am not sure where the "stealthy" bit comes into play because that Holley EFI would not fool anyone into thinking it is a Q-jet.