Filling Throttle Plate Holes

On my 750DP, I chamferred the holes both sides a good ways, then backed the hole with something handy, then dropped a blob of solder on the hole. Then with a small butane torch, heated the plate until the two bonded. Then I dressed it pretty with a file, and that was year 2000.
Next I moved over and drilled new smaller holes.
As I discovered; a pair of 1/8s for a 292/292/108 is too big. With the DC292,My 367 liked 3/32s; one in each.
But it will depend a lilbit on your installed centerline and altitude so sneak up on it.