Well, sorta. Haha.
I had to hack a crossbar out of the subframe. The nice thing is Aston cast the subframe in two pieces and welded in aluminum tube across them to make the subframe. I'm able to cut out the tube without going all the way back to the cast, meaning I get to weld the new bracing to aluminum tube, not nasty oil soaked cast aluminum.
The factory crossbar is 3/16" (err, 5 mm) 80mm x 40mm or so tubing in the area I cut off. The dry sump oil pan is too deep too far forward to clear it. So I'm going to put in a piece of 1/2" aluminum and plate the open ends. I'll also have to clearance the subframe for the driver side header and a little bit for the dry sump lines, but not too bad. Here's the piece I'm using to reinforce the subframe; I just drew it up quickly in CAD and am having it cut by SendCutSend. I could do it myself, but for their prices, it's only slightly more than me buying the aluminum, and much less work.

Beyond that, I had to drill out the factory Aston engine mount holes slightly to fit the C6 mounts (those are from Hinson Motorsports, funnily enough) and clearance one area by about 1/8" to fit them. The OEM engine mounts from Aston would have worked, but they're huge, and fluid filled, and expensive. Also not particularly firm, so these should be a good all around balance. Beyond that, I'm just making the actual pieces from the block to mount, which will be very similar to the Ronin pieces for an FC swap.
Fitment is TIGHT front/rear and side/side. I need to make sure my alternator will fit, or find an alternate solution, as it's very close to the strut tower. The crank pulley is spaced exactly one "I can fit a belt through this tiny gap" away from the rack, and I have to pull the factory sound deadening off the firewall to clear the rearmost cylinder head/rocker cover, but it will clear. The rest is pretty easy to deal with, and there is sufficient room up/down to clear. It should fit the larger supercharger lid as well, which I do plan to add eventually.
The transmission will require cutting a crossbar out of the rear subframe. It will fit with it in place, but will SUCK to install/remove. So I'll cut that out and put some interlocking tube clamps for a rollbar in place so that I can easily add/remove the car when I need to service things. The torque tube should "just fit" in the tunnel, but I do need to shorten it, and do a bunch of clearancing on the transmission side to tuck it in tightly.
I'm planning to keep the diff and trans coolers, pull the factory trans cooler out of the Aston, and put in smaller coolers side by side in the same spot, one for the diff, and one for the transmission. Since they have pumps installed from GM, it seems a waste not to use them.
On the engine, I obviously have the dry sump stuff, which I'm running to a Peterson dry sump tank, and probably a custom catch can/vent system. For oil cooling I'm ditching the stock stuff, and using an Improved Racing thermostatic unit in its place, as it's vasty more compact. I'll put a big oil cooler up front, along with all of the other coolers (radiator, AC condenser, supercharger heat exchanger, power steering cooler). There is a lot of real estate up front for coolers, at least compared to what I'm used to with RX7s and the Mustang. Probably 18-24" total front/rear. My intention is to go AN fittings for all of it, mostly for future servicing. I can keep the factory power steering cooler, so that's something. LOL