First time poster.

Finally need to replace residential split system. CAC/LP, forced hot air.

Janitrol furnace (which is ok), Goodman A/C (10 SEER) (Model U-30, 2.5 ton)

I was considering moving up to a York 3.5 ton, 13 SEER system (Model PC48C3XN1).

1900 square foot house, not including the basement.

Long story short, how much trouble is this going to be?

Preemptive thank you for any responses.