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Re: high hump low hump differences
Installing a high hump is just a matter of cutting the hump out and drilling some holes. You'll also want to lightly roll the edge a bit. I just used a dolly and hammer, real easy.
I installed a new repro low hump floor pan into my wrecker and did as I mentioned. Firewalls are all the same.
One other thing depending on how correct you want it. I welded square nuts on the bottom of the holes as the factory did. Real easy to do, just a few tack welds on each. New square nuts are available just about anywhere.
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Bob
63 Impala 283/PG/3.36 (under restoration)
66 Impala 327/PG/3.36
66 Chevelle SS 409/M22/3.55
69 Chevelle 307/PG/3.08 (future restoration)
69 C10 short stepside 454/TH350/3.73
69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!)
71 Cheyenne 20 fleetside 350/4 spd/4.10
71 Chevelle 6/PG/3.08
72 Chevelle 454/M21/4.10
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