tranny tunnel cab not sitting flat after 4" z

[boomer]

I set my cab back onto my 4" z'd frame last night. I see ofourse a few things on the firewall gotta go, heater etc. I was wondering, i still have to do a step notch in the rear and obviously have to have a decent sized one too, so today im gonna take the rear end out and lower the back 4"s like the front.
Just so i can see where things sit because the cab has a rake due to the end being up so its not sitting flat on the garage floor yet.

What im wondering is this. I didnt look really closely as it was getting late but when you guys who have kept the engine in the truck and tranny while z'ing and refitting cab on to frame do you have to notch the tranny tunnel before youll be able to have the cab sit totally flat one the floor. Im wondering if my cab may be hitting the tranny somewhere. I still have about 1 inch to go before laying pinch right at the front. I know i still have to lower the back to put it on a level playing field but i feel even if i do this is looks like it still may be a bit above pinch and thats not possible with the 4" z i did and trimmed the 2" off the cab rails . Question is did u guys have any problems sitting flat with the tranny tunnel un notched. I just let the tranny sit right on the floor when i put the cab back on....

Hope i can get some help here asap.. Ill be checking for replies frequently.. Once again its an 87 so anyone with a 73-87 truck may help me foresure