hey rob a friend of mine has a set of iron eagle 230's that he would be very interested in selling because the last guy backed out on him after a month of bs. they currently have 1.550 springs good to .700 lift with 2.08/1.60 valves. They are also the 64 cc combustion chamber that you are looking for. He is looking to get $450 out of them. if your interested let me know. i would have to say is that if you had the 230's with say .600+ lift cam you would have no troubles meeting that high 12 second goal. i think 11's would be realistic with the 400. with a good set of heads you can never over cam a 400 sbc! what casting number is the 400 you are working on? some blocks are stronger than others when talking about 400's
later,
apples