fuse box swap

hi all, not sure if this is the correct forum but here goes, i have a 82 mk2 scirocco that has the old torpedo/ bullet type ceramic fusebox fitted from factory. this fusebox caused me countless headaches with loose connections and lots of other electrical gremlins. anyway it finally gave up the ghost and died in the middle of traffic and the car was towed home. this happened about 2 years ago. since then the car has lain in a shed in my job. so i decided to rip the old fusebox out and upgrade it to a later CE1 blade type fusebox from a later 88 mk2 golf. the old fusebox had melted internally and iniatally i thought,i'll buy another ceramic fusebox and just swap it over. well the only one i could find was on fleabay, in latvia for about 400 euro and it didnt look much better then the burnt one. so managed to source a complete loom and ce1 fusebox from a 88 golf. i have stripped out the dash and removed the old fusebox ,i have removed/depinned the old plugs from the back of the fusebox and studied the wiring diagrams between the scirocco and the golf and happily they are 99% the same . ie same colour wiring for each circuit. i was contemplating removing the entire scirocco wiring looms but now am leaning towards chopping off the plugs off the golf fusebox and soldering/heatschrinking all the wires but i have to say i'm losing heart. there must be about 150 wires. has anyone ever done anything similar? what route did they go down? either full loom strip out or chop and solder? or does anyone know how much a professional auto electriction might charge? i honestly dont know what way to jump! i keep thinking just get on with it , but everytime i look at it, i just keep thinking ,this is a big job! any advice, tips gladly welcomed. thanks.