Big Block frame mounts for 68 chevy truck 2wd???

[Oldschool68]

Hi im looking for a set of Big block frame mounts for my 68 chevy c10 shortbed stepside truck 2wd!! I originaly had a inline-6 250 with the 3 speed manual that I have pulled out and lookin to drop in my fresh Big block 468 chevorlet motor that I just got done dumpin money into!! I cant find a set of these frame mounts for Big block that bolt to the top of the frame and to the crossmember!! Also I been told there 2 different kinds of Big block frame mounts, one is better then another one is what I got told but not sure which one I need!! If anyone can help that would be great!! If anyone has a pair and is willing to sell me a pair that would be awesome!! Thanks again Dustin S.