I'll try to notch out the stock member then fab the side & rear mounts if time permits.
Was thinking about how to do all of this in my sleep last night, with your input, it's looking much simpler now.
Thanks guys

Any other DIY rear x-members out there.

'53 BelAir 261 3spd/OD 4dr
'54 3100 235 3spd
'79 C30 with a '51 235-'57Bellhousing-'67SM420-14bolt dually
'89 V3500 350/465/205 SRW CC
One Chevy just isn't enough.