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Why would you look for a 35 year old engine, that you do not know the history of, and run it hard to get into the 13's. Why not rebuild it now and have peace of mind. Who says you have to bore it, maybe a good scratch hone will do. Some KB hyper pistons a good cam, rings, rods and mains, oil pump and down the road.
All 68 -76 455 are good. 68 -72 have sallow and deep cup pistons. all 73 -76 have deep cups. 68 -72 heads are very good. 73 -76 heads can be made to work. All of them are good material.
I think for a few dollars, you can do reach your goal, you don't have to go wild with the money. Just a basic rebuild and peace of mind. Then run her hard.
Geno...
Also, you know you will need some decent gearing and converter and tires....
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