SC64 with an UltraPIF modded console ?

Hi,

I own a FRA N64, modded in RGB and own some loose Japanese and American N64 games as well as my PAL collection and since I discovered 60hz retro gaming a few years back, I find going back to 50hz is a bit difficult.

I'm planning on sending my N64 to a reliable modder to have the UltraPIF installed (as well as a region free cartridge slot), which, as far as I know, should allow all games to play with the correct frequency.

However, I also plan to buy a Summercart 64 to play some games I don't own and that have gotten quite expensive, as well as a few translations and romhacks and also to try some 64DD games, out of curiosity.

My question is, will the Summercart 64 work correctly with my UltraPIF modded N64 ?
Will the ROMs play at their correct frequencty (JPN/USA Games at 60hz and PAL games at 50hz) ?