I6 vs. V-8 motor mount clarity?

['70 C/10 SS500]

Well, the Caddy 500 install hit it's first big setback, wrong motor mount brackets. My staggered I6 brackets don't line up with the big Caddy's front located mounts. Actually, the pass. side bracket does pretty darn good, but the further back driver side is too far back to work. I'd like some clarity about the differences between I6 and V-8 brackets. I hear "I6/V-8 postion" thrown around here alot, but don't really know FOR SURE what that really means. I have staggered ones, is that what is know as "I6 position?" Are V8 brackets both in the forward pos., or rear? Some clarity for the record would do me wonders.

For my Caddy motor, I definately need front frame brackets, WHAT ARE THEY? I have universal brackets (steel plates) that are supposedly for this motor swap, but they aren't doing much good without the proper frame brackets.

If I do need to get a specific frame bracket, is there any way to get them other than searching the junk yard?

Help me get this beast in there!