I have a 350 from '71 with all stock accessories (power everything plus AC). I'm putting in a Mark IV 454. Are there any re-usable pullies/brackets? Thanks.

Taylor,
Nope, nothing! Although, you can keep the alternator and AC compressor and ps pump. You will just have to have all of the brackets, pulleys and related hardware. Oh ya, you can also keep the same antifreeze!
You will need a BB fan shroud and you will probably want to change the front springs (that's fun!).

Just got my new front coils delivered a couple days ago, waiting on center drag link and time/ambition to put them in. NPD had the best price on springs...

If you go to the engine forum pnutkeist had the some question if you go down the list, jakeshoe lists all the bracket and pulley part number and costs. I just ordered my ps brackets about 15 min. ago from gmpartsdirect.com I also ordered a new accelarator cable, the big block is actually about 1 inch longer and it only cost 46.85 including shipping. PN for the cable is 336969. Good luck on your swap I'm hoping to do mine before summer. Jim