front backspacing

Hey guys, sorry if this has been discussed already...didn't find it if it has. Trying to see if my front wheels will fit before I buy them. 74 duster, lbp w/discs. Currently have factory 14' rallys with 245/60r14s. Wanting to go to a 225/60r15. The wheels Im wanting are 15x7 and only available with 3.75 backspacing. Just wondering if this will fit or if I need to look at different wheels with more backspacing?