You should have no problems with that setup. You'll want the 1000cc head gaskets though, not the 800cc ones. Ideally you should have the combustion chamber reshaped to the larger piston, but it will work as-is. I'd assemble it and check piston/head clearance with some solder before running it, but that's just to be safe. You shouldn't have any interference if they are in fact 8.2:1 pistons. I haven't heard accounts of using the higher compression pistons with 800cc heads, so I'm not sure how that would work out.
Airhead Wrangler screwed with this post 10-11-2012 at 10:42 AM