Thanks Steve, I am guessing that most purists, myself included, would wonder why you would chop up a historic car like the Begg. But as we know, cars like that aren't historic at the time (when they are back of the field) they are old dogs and acquired by broke people like me who wanted to go racing.
So the result is we see progressively altered race cars which morph into very different iterations in an attempt to stay competitive, I note the postings here which try to track the mods of cars like Red Dawson's Camaro etc, so many changes over the years.