OK, I haven't done this swap, but I believe your dash voltage limiter is 5-volts, so if the bulbs are 5V, no problem.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"