I could use your opinion

Mike, I run the long K1 rods in my 225, and I like it....of course I have a bit of compression.
My friend wayne runs a 170, and that thing hits the RPM's hard.....I thnk that it hit over 6500 before.
My suggestion would be to run a 225.....and maybe add a 500 2bbl to the clifford intake. If you need a 500 2 bbl, let me know....
Your build sounds like your planning really well.....here is a replay of the singin' 6 in my car.LOL
http://s694.photobucket.com/albums/vv309/TerryLScott/?action=view&current=AndrewatSac.mp4
Andrew/Kidd