Well, I chose this tank, not so much because of the 17 gallon capacity but more because it was the only off-the-shelf cell out there that was only 7 inches deep. Most are 9 to 12 inches deep, even the 1,5,7 and 10 gallon tanks. The stock Midget tank is about 6.25-6.5 inches deep so this one really isn't presenting any more of its bum to the ground. I only had to cut the floor of the trunk where the new fill neck and lines come through. I think the stock tank measure about 26 x 14 x 6.25 and this one is 30 x 17 x 7. In fact, the stocker is almost 27.5 x 16 with the flange. I picked this cell up from Summit racing and again, the determining factor was the depth.
I had to cut all the old mounting studs of and grind flush, then I welded on a pair of hinges with the steel straps so the whole tank swings down on hinges when you undo the two bolts. I still need to get some rubber isolators in there and yes, the muffler is pretty close to the tank so I'll need to get some sort of heat barrier there as well.
For the muffler, I just took the stock two muffler unit and the bottom was rusted out of the transverse muffler anyways so I just cut it off and flipped the other muffler/resonator so the bend points out under the rear quarter. I had to loosen all the mounts and push it over as close as possible to the leaf spring without interference.
It's all shoe-horned in there pretty tight but nothing should be rubbing or dragging!
JACK