Piston Choice on 318
I might be a little late posting to this thread but what that heck!
If you haven't bought pistons yet, I'd recommend looking at Wiseco "ProTru" forged pistons. They make both a +0.030 and +0.040 pistons for the 318....AND they have a 1.800 compression height!
For more info on the pistons....
http://www.wiseco.com/PDFs/Catalogs/PT08/BuickChryslerChevrolet.pdf
The best price I've found so far... (and where I just ordered a set for myself),
http://www.flatlanderracing.com/
Also, I called Wiseco to check weight, they are 532 grams and come with a 132? gram pin.
-Phil