Alright, I know the 83 and earlier tanks differ from the 84/85 12a tanks in that the pickup tubes are fixed on the old ones and are removable on the 84/5 tanks. But are there any other differences between the tanks internally? I realize the GSL-SE tanks are probably different because of FI, but I would think the 12a tank would be pretty similar, am I right? Thanks
Sean

 

Same, only other diff is a drain plug on the '84 '85

 

https://www.rx7club.com/1st-generation-specific-1979-1985-18/84-85-fuel-tanks-facts-416682/

The main differences are the size of the pickup tubes, intank finlter and the cup. Check out the pics I posted in the link.

 

ok thanks, seems the 83 and earlier tanks are internally the same, just have fixed pickup tubes. My 83 tank has a drain plug though.

 

Yep.

 

Hrrmmm my '83 parts car didn't.

 

No one here seems to have mentioned that there is a difference of several gallons in capacity. The 79-80 had a full size spare tire. At some point after that, they started using the space saver spare, not sure what year, and that provided more space for fuel. The 84-85 for sure had more capacity than the 79-80. Look up the specs and you can readily find the facts.

I built a convertible from junk parts, including the front of an 84 and rear clip from a 79, and ended up with a full sized spare.

 

Was the small spare tyre for US only?