I've seen several solid-axle trucks in which later model seats (not as thick) had been installed - both with and without the gas tank, but I've never been able to find out exactly which seats they were using.

I'm really tired of having to drive with my legs in a semi-cramped position because the stock seat forces me too far forward (and I ain't fat). If I could get some thinner seats I'm hoping to get at least a couple of inches legroom. I have a rear fuel tank, but I prefer to keep the front tank as well because that gives me an extra 250 miles or so driving range.

Anybody out there installed a later model front seat in an old truck to gain leg-room?

Thanks