I picked up a comp double roller chain set at a swap meet and at the time didnt think about it.

Its a 3 bolt cam 4x sprocket. My cam is a 3 bolt also. My oem sprocket is a 1x but my block has the cam sensor in the back and not the front. The comp cams book says 1x and 4x are not compatible but it also says that rear sensor blocks are not affected by sprocket sensor marks?????

I am confuzzled. Will it work and just pick up the timing off the rear of the cam or do i need to ditch this chain and get another.

I have a ls2 cover with a front sensor in my shop but the rear sensor cover is what im currently using.

Block is a gen3 6.0