I am building a L28 for my 240 and want to keep my triple carb setup. What would be the best head to use with flat top pistons? The car will be a daily driver so I dont want an incredible amount of compression, but I have no problem with using premium gas. I also dont know of any differences in valve sizes or anything like that, so any info would be great.

Check out this link, it explains the pluses and minuses of each of the heads.

http://www.geocities.com/zgarage2001/heads.html

My preference would be an E-31 with the larger 280 valves, but an E-88 with the 280 valves will work just about as well. The N-42 and P-90A would be the next choices as they already have the larger valves.

It all boils down to what you can find for a decent price that doesn't require a lot of expensive machine work.