I would check the parallel of the mating surface of the bellhousing first, I had mine dead nuts at .002 tir and found my bell was not parallel so I had to put in a shim between the block and bell. When I did that, it totally screwed my number and I had to start over again. I tried the lakewoods and wound up drilling and slide hammering them out. I finally just ordered the Robbmc ones and within a short period of time after I got them it was within book spec.
Tim