400 budget compression HELP +++++

My math says with no decking (pistons down about .026),and 76cc heads, you might get 9.5 Scr,and zero-decked, you might get 10.1.With an open chamber head, tight-quench on this combo,is not obtainable.But I'm guessing at 76cc those heads are not open.
-So With the new numbers; 9.5Scr, that 284/484/108 cam,Installed at 70*ICA, the Dcr rolls in around 7.2, and the cylinder pressure at a tic under 140.The bottom end will be a quite soft
-If you get to zero-deck/10.1 Scr, things look a little better at 7.65Scr/150psi.Not quite so soft.
-If you advance that cam to get an ICA of 66*, then the numbers @10.1Scr are 7.9/157;and now you are getting somewhere.
- All numbers are estimates based on assumed inputs and subject to change on assembly day.The assumed numbers are 76ccheads,pistons down 6.4cc with 5cc eyebrows, and a 10.4cc gasket, so total chamber size is 97.8,unmachined, and 91.4 at zero deck. I used a swept volume of 831.5cc
-I reviewed the thread and did not see you mention anything about cam size. On that note, I would mention that the next size smaller cam would pick up the bottom end quite a bit. but then, maybe a 400 with a slightly soft bottom end, isn't really soft at all, compared to a 360. And really, even with a soft bottom, it might still be stronger than a stout 360. Sometimes a ton of torque at take off might not be the best thing,lol
Good fortune to you.