Good work.
Yeah those allens are sometimes pretty tight. You have to clean the head out before putting your allen wrench in but once you get it in good and all the way down you can put tremendous torque on them without breaking anything. You'lll swear something is going to break but the threads always let loose first.
How much clearance do you have above that cross member?
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.