Gen III Mounts that put the motor high and far back? What are you running?

[Mandic]

Sorry to ask a question that has likely been asked a hundred times, but I think how much I want to move this setup makes it a little different.

Tonight I finally got around to mocking up my 5.3L/4L60E combo in my 65 GMC C10. I used these plates with the stock I6 rubber mounts and frame mounts. It required slotting the frame holes on each side a bit but after that sat right in and bolted up.

However I have a few issues. The motor sits in a good spot but it has plenty of room to go WAY farther back in the truck. Also with the stock 5.3L truck pan it hangs way low(no surprise there). And the factory exhaust manifolds hit the frame mount so I cannot run them. Which leaves me likely having to build a set of headers.

So I am wondering, does anyone make mounts that would allow me to move the engine back a good deal farther and up a good bit also? I am foreseeing that I will have to end up making mounts to get what I want out of this. I could easily go back a good 3-5" I think and also go up another 2-3".

I really doubt anyone makes mounts to move the motor that much, I guess I am mostly wondering if it has something to do with the I6 mounts.