454 Motor Mounts

[kansasc10]

Hi all,
I'm just about done building a 496 stroker to put in the 72 c10. I have the original perches from the 350 that I pulled out of it. I also have the complete original motor mounts from the 454 Bbc. My question is can I use the mounts and perches I already have to get this motor in? I'm worried about using the original 350 perches because of the added weight of the big block. I'm assuming I could use the clamshell mounts from the 454 somehow but not sure if I need to buy perches for them to sit on or what I need to adapt them to the frame.