WHEN the F.I.A. changed the regulations in the middle of last year governing sports prototype racing, it didn’t give a fair chance to the two long-distance races early in the year at Daytona and Sebring to obtain a very good entry. With the demise of the giants the Porsche team were prepared for an outright win to start the season. A new 907 prototype arrived in December and did a series of tests, only to finish in pieces when Neerpasch crashed in a spectacular way, but without much personal injury.