Manual or auto trans 2IS there? Manual or auto going in?
Auto in the 2IS and a 6 speed T56 (manual) on the LS1. Just received my Wilwood clutch pedal last night so I'll be doing some clutch pedal placement very soon. The electronic brake control unit is definitely in the way of the future spot of the clutch master cylinder so I'll have to figure out a work around for that.
I was planning on taking a bunch of measurements once the engine was out but I couldn't wait for the first test fit. The LS1 fit in well but there is definitely a sweet spot between the bell housing hitting the top of the transmission tunnel and the bottom of the engine clearing the lower cross member enough to fit an oil pan. The engine sits pretty low in the bay which fine by me since hood clearance shouldn't be a problem and so my cg stays nice and low.
Side to side there is a ton of room. The LS1 is probably 5 inches narrower than the 4GR-FSE so I can pretty much reach my whole are down the side of the engine.
I think I might luck out with the transmission brace. The existing transmission brace was about 6 inches forward of the new support location. I saw a few black caps behind the existing brace and when I pulled one of them off there was another set of tapped holes in the chassis almost exactly where I need them. Hopefully I'll be able to get away with some drilling and shimming of the existing transmission brace.
Next on the list is measuring for engine mounts and once I get the mount material on order I'll be installing the clutch pedal. Hopefully that can all take place this weekend.