I have just purchased a 71 opel gt that has spent the last two years being all restored except for the long block and a few ancillaries. I will be using the car as a toy/nice day commuter. I am wondering how I can make it more Highway worthy. Is there an easy bolt on 5 speed? And is there an easy way to eek a few more horsies out of it without shortening the life of the motor? I am not looking for a race engine, just a strong engine that I do not have to worry about. Oh, one more ?, about what temp range should the motor be at its max (guage wise).