I wouldn't bother rebuilding the 205, drop in a 207 short motor freshen up heads and some head studs I.e arp 625 etc etc bolt up and tune...more expensive is the path I took built 207 with scat rods,cp pistons custom compression ratio, big cams, converted heads to shimless and a few more bits I have forgotten

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race tape y pipe running .05 bar till spares turn up.