A few years ago I had the C motor in a 1972 Pantera. The engine had been bored .010. I used the Pantera web site for advice, info, etc. The consensus of opinion was ...be careful when boring a 351C .030, and even then the recommendation was to have the block sonar checked to see if the block had shifted. Some 351Cs would not allow ANY boring. I finally went with .020 and had no problems that you could trace to the actual engine.
The Aussie 2V heads are very good and you probably would be safe @ 9.5 compression ratio. Millling the new head wil get the quench area of the heads closer and help in preventing detonation. I came out with 343 RWH.
Try and find the Pantera Web Site as they are pretty heavy into the 351C, although the 351 W is a much better initial choice.
Harris
