[Richard2112]

It isn't difficult to "crawl under the truck", any more than it's a simple matter to unbolt the seat. In fact, my truck has plenty of clearance. Nor is it especially difficult to drop a fuel tank when changing the pump or sending unit. But it by far a simpler matter when there is access to the fuel pump through a body panel and very easy to create one.

I am tuning my carb, setting my timing and working on the speedometer and rear housing extension.. If I adjust my carb while the tunnel is off and want to test drive, I put the tunnel back, replace the seat, so there is no exhaust fumes from other cars, road noise, sand/gravel coming through the hole, then pull the seat and tunnel again.

None of this especially difficult but since the seat has nothing to do with tuning, speedo calibration, or trans adaption, it becomes (quickly) annoying to continually R&R the seat much as if one were testing various fuel sending units or pumps having to drop the tank each time.

One might be surprised how much can be accessed through that tunnel. Granted one could slide under there on the cold concrete driveway when it 4 degrees outside or after it has rained, but why?

It's a simple matter to R&R a fender also but if removing it was necessary to change the spark plugs, one could rightfully say, "what were they thinking?"