How much would I lose?

Awesome! That's what I like to hear! I thought the lsa sounded odd at 104, I purchased the cam from another member on here. I took the numbers off of the back of the cam and called comp, they emailed me the spec card. I actually emailed them again, recently, about getting a cam that would bleed off more pressure, and the one they recommended was almost exactly like this one! lol. I think the cam was spec'd originally for a circle-track style 340, as it had w2 heads, but a small 500cfm alcohol carb. Right now, I have a new (well, rebuilt with good parts) 904, I would just want to put a manual vb in it. I wanted to go with a 26" tire, and well, your combo is really close to what my original plans are/were! Thanks for the input! What size carb would you say would be a good match for this? Also, do you think it would run those times with the dual plane? If so, I'm all for getting it.[/QUOTE I'm talking dual plane intake and junk heads. Ran 10.70's with 4.10 and using all 3 gears and 4 bbls of carb. Mid 11's in an A body is rediculously easy even with stock cubes and old iron heads. Your way ahead of that mess.The cam will die early with too tight lsa and smallish lobes,but for low rpm grunt may work well.