Want to install a roll cage in my truck and thinking of buying a jd bender model 3 to do it. For those that do bending work which die works best for building a tight fitting roll cage. 1 3/4 (5.5-180) or the 1 3/4 (6.5-180). Would like it to fit very close to the a pillar and windshield area. Any suggestions would be appreciated.