some years ago I replaced the airpump with an aftermarket pulley set up , when I replaced the belt the pulley wheel didnt look to good little wobble .... question what legnth belt would I use if the pulley gets bad as I have to make a long trip & dont want to be caught short if the pulley gets bad , is there any tricks in hooking up the shorter belt ...as how its run ? thanks in advace , its 1990 coupe 5.0 stock has 200,000 & still running strong original motor & tranny , I still love her like I did when I bought her .... PS she came with the special service option & I have the window sticker .... it was a $600 option the total cost was $15,000 , I put a mac power chamber exhaust in 13 years ago & it is still in great shape .... ball joints & a few minor items is all I ever did ..... she was one sweet machine & still gets looks even though she has some wear .............. thanks in advance