I was trying to be helpful not so much trying to be rude.
That is one post, I wish you could have seen my lovingly expression.
I do really think 1:64 hotwheels work well with 1:87 HO. You can always put the 1:64 items closer to the point of viewing to make an illusion of distance.
So 1:48 and 1:64 will probably work the same way.