Hi Norm,
Yes these days the overzealous police will probably Taser you first for being out then ask questions .
I probably have 10 Rover ute mowers ,a few have Suzuki 2 stroke motors already and I have a few Victa
ute mowers with PT's , three of my old Rover ute mowers look a little different ,one someone has extended the wheelbase
and another is fitted with a Lawn Beatle engine and one has 1963 Victa Corvette handle bars, the Rover ute should look
good with a PT motor.
Looks like you have a few mowers you can get ready to sell Norm until restrictions are lifted .
I think the ones with the plastic grill are 4 hp Mf ,the numbers on the cowl should reference it to having the cast iron bore,
but for such an old mower still with good compression I would think it has lasted longer because of a cast bore.It has the
4 hp sticker on the cowl still.
The K Mart mower is

especially with the gold catcher.
Cheers
Max.