auto choke on a 86 b.b.?

[BUXMAN66]

posted a question but i screwed it up by posting it on the 73-87 parts board!anyhoo,i was wondering how difficult it is to replace the electric choke assembly on my 454.i got a 86 3/4 ton w/a 2 bbl carb.and it dont like to come to life none too well after sitting for awhile.(w/o all the coughing ,sputtering and wheezing !)gotta keep the rpm's up so it'll get warm,after that it's ok.went to my local napa store to price the electric coil assembly for a b.b.454 on a 86 3/4 ton truck and they gave me a price of 60 some bucks!i was thinking that thje coil assembly on a smlblk. wasn't more than $5.are the b.b. assemblies and smlblk. assemblies that much different?thanks to any and all replies!