I ordered a set of performance cl5+ brake pads for my 914.

They only fit the rear calipers. The front pads in the car measure 61.8*53.8

https://clbrakepads.co.uk/products/cl-brake...ng-braking-pads

I'm wondering if these will fit they are narrower and taller?

Any idea why I have different pads on the front and back?

Over the years guys have found different car makers that have used the same caliper company that were used on these. And some of those were swapped on to 914's for better braking. That said I do not know if that is your case. If you can post some pictures of the caliper. There are some real experts on here