ORIGINAL: blw
Very good pics.
Dawn Power Dissolver will clean a lot. About 45 minutes is the longest everyone says you should leave it on aluminum. I like soaking in a crockpot with antifreeze for 10-12 hours. Don't put the crockpot back in the kitchen.
I've had pretty good luck in the past with a mixture of denatured alcohol, simple green, and a squirt or two of PB Plaster... I call this poor mans degreaser. When I get around to it, I'll clean the .40 up and put it on the test stand and see if it'll run. Right now I'm working on building a hybrid flatbottom hydro thats getting an old K&B .65 that I got NIP.