I have a 327 in my 1935 Coupe. It starts well cold and runs well. When it gets driven a few miles and the engine gets good and warm, it does not want to crank very easily when it is still hot. The temp runs about 160 or 170. The alternator shows to be charging and is new. The battery remains fully charged. The engine seems to turn over easily but it is difficult to crank until it cools down sufficiently. What are my options and where would you suggest I begin to resolve this problem?