Oh Lockstock, even though the way the catcher attaches is the same, it won't fit that deck!!
That is quite a rare item you have found and it would be a shame to butcher it just to force it to fit on.
I actually have a SP Victa that takes that and would love it.
Basically that catcher is from the first variant thumb latch high arch alloy chassis introduced 1973, and the one you want is from the second variant introduced 1976.
They are only forward compatible , IE the first chassis variant can take the catchers from the second, bit not vice versa.
Besides, the one you want are much more common as the production run was much longer for the second variant SP chassis than the first.
I have two here. Would gladly swap for your catcher if geography wasn't the enemy.
