what is the bolt pattern?

[LOKI3006]

ive got a 77 k5 with corperate 10 bolt front 6 lug and dana 60 8 bolt rear but for the life of me i cant remember the bolt patterns of each. dose someone know or tell me how to measure to find out please!!!! i need to order these spacers and get this brast on the road!

 

[MTBLAZER89]

6 on 5.5"

8 on 6.5"

Just search for some 8 lug outers for your 10 bolt. Probably cheaper.