[G_Don]

I took measurements on the first two cylinders with a dial bore gauge and mic set to 3.955". Hope the way I laid it out is clear.

Cylinder 1: top
3/9 oclock: 3.9551"
12/6oclock: 3.9562"
10/5oclock: 3.9552"
2/8oclock: 3.9566"

Cylinder 1: bottom
3/9 oclock: 3.9557"
12/6oclock: 3.9562"
10/5oclock: 3.9565"
2/8oclock: 3.9554"

Cylinder 2: top
3/9 oclock: 3.9545"
12/6oclock: 3.9555"
10/5oclock: 3.9552"
2/8oclock: 3.9552"

Cylinder 2: bottom
3/9 oclock: 3.9548"
12/6oclock: 3.9558"
10/5oclock: 3.9562"
2/8oclock: 3.9553"

The pistons I bought from snyders measure 3.952" using a mic.

I purchased a lisle rigid 4 stone cylinder hone which came with stones of 80,180 and 280. I purchased a 500 grit stone separately.

My question is that it seems as though the cylinders arent very cylindrical. Im assuming a taper of 0.001" and being out of round approximately 0.001" is not acceptable? I'm on the verge of 0.004" clearance total (clearance is measured diametrically and not radially, correct?).

Would using a 500 grit cylinder hone be take out too much material? Do the measuremnets I took seem like the block needs to be rebored out to a 0.100", as honing wouldnt be enough to correct the 0.001" taper and out of round?

Thanks for your help