jeez that's so lucky
we had a similar thing when rallying the astra, but didn't get away with it
with twin webers on the car there wasn't that much room for the steering arms, which bolt in the centre like a sud on the mk1 astra,
anyway after a rather enthusiatic moment coming into a 90 left through some iron gates we got sideways on the way in, pretty much full opposite lock which caused the steering arm to catch the alternator. normally it would miss but with the twin 40's fitted the alternator has to drop down a bit on lower brackets...
anyway, completed the stage with no alternator belt, turning everything off to save power we made it to the end of stage.
not long before the next stage at service so a rather hurried new belt got fitted, which to get at you had to remove the whole airbox which was a large irmscher type one that bolted on with 8 nuts & bolts, you ahead of me yet............
next stage all going well until about 3 miles in we dropped onto 3 cylinders
now, the astra was very prone to breaking rocker arms and if you're careful/lucky you can drive steadily out of the stage which we did, but the engien got worse and worse.
once back we then found out was a little bit more of an issue
one of the nuts that held the airbox on had come loose (maybe in the rush not tightened up properly) and had promptly gone down the carb throat
damage once stripped became evident, snapped valve heads leading to big hole through the middle of the piston
wrecked head there the broken valve head had been punded into the head face
wrecked a cracking 1.3 8v engine that revved happily up to 7.5k, really great engine that was. the early 8V OHC astra engine was a real peach, that one especially so. never was as good again after a rebuild
indeed, you were VERY lucky
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