I would estimate that I sit about 3/4" higher in the new seats.
I would think that should be fine for most people...you used their brackets for mounting?
I would guess they have to be a lot more comfortable than the factory originals.
Did the dynamat make a big difference in road noise? I am fixing to do floor pans and I was giving serious consideration to laying it in. Remember how much you used for the floors?
Sorry for all the questions but you are one step ahead of me and I like to learn from someone that has done it.