I remember seeing someone who had done this maybe in Ireland. I found the link after digging around on either club-k.co.nz or kp61.net. You'll have to join and do searches. It sounded awesome!

My personal opinion is that twin carbies on a stock 4k is complete overkill. One single downdraught weber/dellorto jetted and tuned to suit will do fine. My 2c.

i have a set of twin side draft solex's on a 2tg in my celica and it runs as my daily once you tune them right they'll go just fine

 

a mate of mine had dellorto's on a 180b datto with abit of work done to it and they were apparently tuned properly and it sounded like a bucket of shit