Looked at Aero website and no tanks for years prior to 70. I need a 23 gal tank for 66 stock truck and wondered why Aero tank not offered ? Paul, you know of any reason the WH tank would not fit ?
Nope. I'm sure it's the venting. Our tanks are expected to fit ANY EB from '66 to '77, but sometimes the different years require a slight change in plumbing, or simply blocking off extra ports.
Or better yet, "upgrade" an earlier vehicle by actually utilizing the later features such as fill-vents, evap vents (by adding a charcoal canister), internal pumps for EFI (since we often upgrade to EFI on the older rigs anyway), and anything else that's needed.
The physical dimensions are the same for all years, and even the '77 with it's completely different design is compatible with the tank.
Paul