I've built a couple engines with similar parts, lately. A couple of things to think about:
1. The piston clearance on the forged Wisecos is more than on the cast pistons: about 0.0018"-0.0022" because of the differing materials. This means they will always sound a little "slappy" when cold, and act slightly tight when the engine is first started up warm (not hot) after it was fully warmed, then parked a while (because these pistons cool slower than the fins and liners). So, don't fire it up warm and rap it up tight: give it a minute or two for the heats to rematch first. If you don't, over time it will scuff the wide sides of the piston skirts and start damaging the rings. This has always been the hallmark of forged pistons in these engines, when not run "just so" in daily riding. (I hope this doesn't start an argument...)
2. Those Wisecos work fine in the "K" engines as 10.25:1 compression with the stock cam, unless you also add a quench band around the circumference of the chambers to match the bores: then it comes down to about 10.1:1. With the "F" engines and that stock cam, they come in at about 10.1:1 compression without quench and 10:1 with quench bands. With the #41 Webcam, it drops to about 9.7:1 because of the excessive overlap of that cam. In any case, the compression goes WAY up, because the bores are so much larger than stock while the chamber remains the same size. Even the flat-topped 836cc (65mm) "cheapie" pistons raise the compression ratio to almost 9.5:1 with the stock cams in the "K" engines (150 PSI test pressures).
3. The #41 cam noticeably drops the midrange torque. In turn, it causes the Four to act like a Kawasaki Mach III at 6500 RPM, launching it to 8500 RPM with a sudden lunge. This is even more pronounced with the Wiseco pistons due to the extra compression. Advancing the cam is a good idea to try to tame this down, else it may be a handful in heavy city traffic situations, which was what largely caused the demise of the original Blue Streak.
Overview comments: if using the cast 836cc pistons, stick with the 0.0008" to 0.0012" clearance, break it in properly and it will become 0.0015" quickly. If using the forged pistons, the harder metals heat and cool differently from the cast versions, and do not wear in so quickly, so it takes a little more space at first to let things settle in. But, the forged pistons are not 100,000 mile pistons, primarily because they are not a matched-metal system. They will wear the steel liners faster than the softer aluminum pistons will over time, where the soft ones fairly polish themselves smooth against the harder steel bores, making them last longer.