This is a very difficult question to answer...

At the time it was said that Frank gave the car to Repco because he owed them money and he wanted the F5000 engines. That is just as improbable as his own explanation (of latter years...) when he said that he loaned them the car for exhibition purposes because he wasn't going to race it any more.

Let's be plain about it, Repco loved Frank and were happy to back him. This is clear from John Walker's story about the 1975 Tasman Cup, or was it Frank Hallam's comment? "We never got this close with Frank..."

For a time Frank had a Repco engineer working with his team to tend the engine, he got the best engines first. Mind you, he did give them two AGPs and many Sports Car wins.

He further claimed that when Repco went through its upheavals it was thought to belong to Repco, when Nigel Tait left he bought it from them.

The truth about that might well have gone to the grave with Frank, though Derek Kneller might know something about it.

Frank also claimed that the SR4's usefulness was killed off by rule changes to the Can-Am, where he'd intended to compete. He said that they banned racing engines (regulated to stock block only) when they saw the potential of his car.

I would call that 'spin', which was not unusual for Frank. A couple of years later they had Porsches, didn't they?