I have the same problem. Now recognize that my drivers seat is sitting on a 1999-2004 2002 Jeep Grand Cherokee, Power seat track. I modified the heck out of attachment brackets that I made, to drop the seat as low as possible!! I measured that the seat at bottom would be about 1/2 " higher than with the standard track. Did this so that my wife could also drive the car. So...this isn't stock. Plenty of legroom.. and enough headroom for me to fit.. (I'm 6' 1").
However, the steering wheel is still too low in relation to the seat.. so I have to slide in and when driving, its a little bit uncomfortable..
Now, one of the things I noticed, is that I thought I could adjust the steering wheel at the floor, to raise (pivot at the dash) the wheel say another inch.
NOPE...I have the standard (not rally) dash, and being a 74 has the Key Safety Interlock switch on the steering wheel, so that you have to depress the switch to remove the key. If I try dropping the steering column at the floor, to swing the wheel higher at the seat, the interlock switch hits the bottom of the dash!
Now the older Challengers don't have that safety switch, so I presume you can adjust the wheel a little higher. Also, I noticed by looking at others that the Rally dash does not stick out as far, so that the safety key interlock switch will probably not hit it.
Any suggestions?? And no...spending about $2000 for a rally dash isn't an option..
Thinking of buying a 13 1/2 inch Grant steering wheel to help a little but hate to take off the stock 3 spoke wheel which is in good condition.