Obviously people's definitions of "musclecar" vary widely.
I'll pick one (though it's hard to pick just one) that is strangely missing from your list;
- 1970 Chevelle SS454 LS-6. The LS-6 had four bolt mains, forged crank 11:1 compression, solid lifters, rectangular port big valve heads, aluminum intake, Holly 4 barrel and 450hp. Make mine Cranberry Red with an M-22 rockcrusher and 4.10 gears please.