64 cuda stock tank in tank pump?

More Information for SPECTRA PREMIUM SP196A1H
Holley 12-319 Holley 255 LPH OE Style EFI Fuel Tank Modules
Both of these units are drop-in replacements for your stock sending unit/pickup, no mods required to your stock tank. I have used the Spectra unit with no issues in an A body tank, even though it's listed as an E body replacement. On one install I had to tweek the pickup tube a hair to clear the bottom of the tank, but I've had to do that with stock pickups, too. I just listed the Rockauto link as reference, most jobbers can get them.
I haven't used the Holley, as it wasn't available when I did my installs, but I have heard good things about it; plus it is listed as an A body direct fit.