Thread: 355 build HP and Torque?

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Update:

After cleaning off all the carbon deposits, of which there was hardly any, and with the valves still held in by the original springs, I cc'd the Vortec heads tonight.
6 chambers measured 66cc's
2 chambers measured 65cc's.
I didn't have the correct sparkplugs, so I used the old set out of the 89 350. They are shorter and hang back in the threads. The sparkplug hole inside the chamber held about 1/2 cc to fill it up flush with the chamber, so deducting the 1/2cc from the above measurements would give 64-1/2 and 65-1/2.
So now what do I do to balance them if needed?, or is that close enough?
Do I match the larger ones and remove 1cc material from the 2 smaller chambers? I read about "sinking a valve" on another racing site. Should I have my machinest grind the exhaust seats a little on those 2 chambers to make them even?

Actually I'm wondering if my measurements could have been off just enough, to not worry about it and assume they are all pretty close as they stand.

At this point I am assuming the heads don't need a valve job, although I do plan to do a simple fine lap job on the seats, after they check out on the magnaflux and then pin the studs and install the beehive springs.

Using 65.5cc and 18cc dish pistons, and a .040 quench, I calculate an 8.90 SCR and 8.08 DCR with my new cam calc of 29 IVC at 0.050.

Wow!, Look at all those numbers I'm throwing around, that I had no clue about a few months ago.

I think my next step is to finish stripping the block, taking it to the machinest, verify the bore size and order the pistons.

Thanks again for all your input.
Together we are going to build a very nice engine.