yes the bulb number is a 74... i unfortunately had some computer issues and i cant find the website i was at yesterday. they had LEDs for sale that were made with the attatchment that was a 74 sized bulb. it wasnt all that expensive either like $5 a pair or something in almost every color.

i just put blue bulbs behind my gauges, very easy on the eyes but wasnt exactly the color i was looking for. it was more dull then expected i guess i need the color of an LED to really get the effect. oh well still looks nice for now. for $2 that someone gave me i cant complain