400's are they any good?

Agreed. I'm keeping an eye out for a 750 AVS, probably an Edelbrock thunder series. They pop up on craigslist every now and then for $150 or so. Love the adjustable secondaries.

Nice carb,I had a 650 on my 318 and loved it. Easy to get parts and change jets etc.

My second choice would be a TQ,but not so easy getting the parts you need.

I wish the aftermarket would step up with a tq tuning kit,like what used to be available. Why? I just think it's a better design..