"manifold" gifts

I've been struggling with the ideal replacement for the CV's on my 145 (74) "Helga". CV's just won't last long with the higher octane fuels as the diaframs go "all sloppy". The replacement diaframs just do not have the qualities of the older original rubbers. (Where have I heard that before?) With "esperanca" the partners 144 we ovecame this by fitting a wonderful set of new SU's from SU Mindel in Sydney. $650 odd for the two NOS. Worked wonderfully.
Helga the Orange 74 beast was to be converted to K Jetronic but...
Too much away from the kiss principle of home life. Soo now we have a wonderful "lynx" single weber crossover manifold. 45 Weber to follow.
First I have to access the spare engines to see if it is better to fit another or go the reconditioning route. Whatever some changes to the cam and head will ensure it has more torque and less likely hood of pinging on crap fuel.