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First thing to do is set the first piece of sheet metal for the tub where you want it , make a mark with a sharpie down the lower edge where you are going to cut it . Also drilled 3 holes and used cleco's to put back in the same location when installing the tub back in.
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Next jacked up the car and removed the tires , cut the back piece and reinstalled it with cleco's . Measured from the back piece to the outside sheet metal and wrote measurements about every 3 inches on the back piece . Using the shipping box that the tubs came in I made a card board pattern and transferred the measurements from the back piece to the card board pattern . I took another piece of the shipping box and rolled it and taped it to the first pattern piece . this made a card board pattern of the wheel tub . Using the measurements on the pattern I made marks on the edge of the cardboard tub . I cut the outer piece about 1 inch shorter than the measurements . This gives you a little room for what comes next .
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Most tubs come in a flat box and need to be assembled , with the help of the corner of my shops wall I could hold the top of the tub and tap it down into the joint and roll the edges over forming the tub assembly into one piece ...
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I placed the cardboard tub in the car wheel well and clamped it in with cleco's and clamps , using a contouring tool and a sharpie you follow the sheetmetal with the end of the tool and mark the paper tub with the sharpie . Take the paper tub out place and into the assembled tub and reverse the tool and mark the sheet metal with the sharpie following the marks on the paper tub . if done correctly you will have only a small of trimming and it fits snuggly into place . Using pop rivets to hold the tub in place to finish the install under the car ..
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Used a level to make sure the tub is level form side to side . I placed a 1x1x16 inch piece of square metal along the lower edge of the tub . squared it up with framing square and welded it in place . This piece will be part of the battery box bracing and will help when the floor is attached to it .
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A side shot of the square tube in place and squared up with the rear frame rails , when finished up there will be a frame made to hold the battery on top and muffler hangers on the bottom .
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Tub #2 assembled and ready to be installed .
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You take the cardboard tub apart and reverse it and place it inside the assembled tub and mark and cut it , following the same procedure as before mark and cut pattern first and the mark and cut sheet metal and install ..
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The 4 things you will need for this job is , Fresh sharpie , cardboard for pattern , a contour took ( I got mine from Chris Alston Chassis Works ) and the last thing is a PAIR OF GLOVES , THIS STUFF WILL CUT YOU UP ...
On how do TUB installs go to Chris Alston Chassis Works web site , go to bottom of page and you will see Tech how to , open it and look down page to find TUB install how to ..
It has detailed pic's on how all this works , The process use to kick my butt until started to do it this way ...
