You can find good reconditioned digital displays, brains etc. This will be a cheaper and easier solution than conversion.If you get all your digital stuff working correctly and refreshed it will last many years after that. i have had my 84' for 25 years and I bought two new brains (last one 10 years ago) and a new cluster (12 years ago) and everything was great but lost the gas gauge. I have found a used/reconditioned one for $180 bucks so I'll be good for another 12-15 years hopefully. When working the old Digital dashes are great.
Jeff Leeds
El Granada CA
97' Q45t
05' Xterra S 4X4
84 300ZX (original owner)
99 Sentra (wife mobile)
85 Maxima RIP w/295,000
77 Celica GT Liftback (Sold in 84)