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I have a 1966 f 100 short bed frame..i am going to purchase another frame to custom install a irs-and a ifs...what year frames will work to install under my truck..please give me years 61--66 short wheel base..if unable to locate sb frame could a long frame be used and sectioned when doing rear install..looking to see if attachment points for bumpers and cab etc. are same..any help..thanks in advance...
Starting in 65 2wd the twins were introduced so a chassis change occurred. The 65-72 chassis should be pretty identical bumper to bumper. 65-79 cab & front clip, 73 up just behind rear cab mounts measured cut could be used. A long bed chassis could be used with identical measure cut past rear cab mounts.