I'm doing the same thing. I just bought the Canton Racing pieces should be here in a couple days. I wasn't sure if I wanted to drill the block so that's why I went with the adapter. I like the billet versus the cast items that are available.

http://www.summitracing.com/parts/ctr-22-595

http://www.summitracing.com/parts/ctr-22-625

http://www.summitracing.com/parts/ctr-22-575


408 Stroker 533 HP 520 FT LBS...........................1970 Dart RMS AlterKation