What plugs should I use?

The colder plugs would be ok for an engine that sees the strip only but I assume you're going to drive it on the street. Cold plugs tend to foul in stop and go driving. I run Autolite 66's in my 360 with 11.5 compression and W2 heads. Race only vehicle. They burn clean, etc. I would stay with the 66's. Good choice with the Autolite's they last long!

Tim