Ahh, it really is production spec racing...thats good though. I suppose the rule don't allow any obvious or visible lightening either, like drilling door hinges. and spring hangers. 1200s are light to start with which makes the challenge greater. The engine could be dealt to though with the crank getting knife edged and an alloy flywheel and front pulleys. Shave all the #### off the block like redundant mounting bosses etc. On my car I even drilled the wiper arm mechanism.