compression or flow?

Well I might just go with the 340 and W-2 heads then. I need to mock it up and do some measuring to see exactly how far the stock pistons are out of the block. The block is apart and I dont have main or rod bearings to do that yet.

I also need to CC the heads to see exactly what CC's they are. They are open chambers and from memory they were 70. I really need to know for sure. I did check and the W-2 heads have long valves. I have nearly an inch from closed valve to retainer clearance. I have both iron and roller rockers with the offset shafts and stands. Dont know anything about the springs.
Not opposed to a big cam jerking around at low RPM on the street isnt a deal killer for me.

And im not opposed to using my 391. I just thought the 355 would be a little more highway friendly.



BTW you guys are awesome and a lot of help.
Thanks. I have been out of this game for a while.