Vin is great, but if you're building a V6 you should also get hold of a copy of Jim Kartalamakis' new book the Alfa v6 performance manual when it comes out in may or june (I get my books through
Home Page in Perth) - I've got a few go faster bits from PACE that have been fantastic in the past and I've relied on Kartalamakis' 2l book extensively.