[Critter]

When I got my Blazer it had a tank from a Blazer/Sub already in it. However, I think it’s from an early 80's model, not an EFI set up. I believe the outside dimensions of my tank and what you are wanting are the same. Having said that, I like my tank and plan to keep it after I finish restoring my K5. It fits nicely between the frame rails and hold 30+ gallons. The PO added an additional cross member made out of heavy gauge angle iron for the front straps to attach to and drilled some additional holes in the rear cross member for the same reason. I will say this; you will definitely need to use the tank straps that came with the donor tank, not your original ones.

I happened to have a couple pics on this laptop showing the tank without a bumper on the blazer. It does hang down quite a bit so it probably wouldn't be best for rock crawling, but as far a looks, a factory bumper will basically hide it. Hope this helps you some.