I zoomed up your pic and noticed the two little bolt spacers - my cross member didn't have spacers but by adding some the side bolts lined right up. Once a manufacturer's bell housing width is set it remains the same for years. The WSM for L185 thru L355 models shows the major chassis components are common to all.
I hadn't noticed the LA452 loader in the pic has burned paint, but it looks like several of the cylinder hoses survived - so their piston and rod wiper seals may still be ok? Best luck sorting it out.
When you get into plumbing the valve, post a pic of the under-seat area of your L245 - I still have one of those aluminum port blocks for replacing Block Cover 7 in the drawing below - I could lend it to you for making a duplicate. Its how to add a hydraulic circuit to these tractors. Take care, Dick B
Hydraulic block (replaces part 7 in diagram) for adding a valve.