Trying to figure out what and who's 5 point safety harness i should buy . Was looking at RJS at summit but it seams every harness I looked at where the same just a different part number . So is there a particular length I should look for . Please help just trying to buy a good harness for my car . 85 capri 10pt cage swing out side bars with a 18 inch pro street kirkey seat . I am not a small guy so lets just say I take up more room than the average guy LOL .