Don't know, apart from: The simpler fuel/ignition systems can (will) give much less trouble than later 420/500 / 560 versions. SLCs seem to be popular / successful in historic rallying.
@yebogorgor started
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Don't know, apart from:
The simpler fuel/ignition systems can (will) give much less trouble than later 420/500 / 560 versions.
SLCs seem to be popular / successful in historic rallying.