the toyota standard twin carbs off the 3K-B engine are absolute shite, from my experience, you are better off using the 2L cortina as a single downdraught, i also have 1 of these lying around in my garage on a port matched manifold.
flirty 30, what do you want from the engine ?, if you want some power, i would suggest saving your money, buying a 5K and working that, if you search this site enough, you will find alot of information.
Xany, i think i might know of a couple of twin carbie downdraught manifolds, which i could get to revhead, to send over to you ?
il get back to you later on tonight about it.
- David