I just got this thru its yearly inspection ,passed ok ,but it56 was tested as a normal ie not catalytic convertor car .I have a problem with pinking ,and if it does,nt have a cat i was thinking of putting in a higher grade fuel .Would this be oK .Is there any means of adjusting ignition timing on these engines .As the distributor only deals with HT side SO TURNING IT WILL MAKE NO DIFFERENCE .
Thanks for looking Steve