Starting to sound like a broken record Jason. On the subject of safety, most of the fast sprint cars are later models which are way superior safety wise to the 60's 70's stuff. Cars like old Datsuns, Minis, are death traps compared, there is a reason why they are light. As for power, spend some money and get a pro to do the engine work. Not just any pro, there are a couple of guru's down south who are doing great work with L6's, particularly with heads which afterall are the key to power.