I have heard nothing but high praise for the Steele gaskets, though I have never used one. Don't know about the repro trim. Original is always the best way to go, but may be hard to find. Maybe you'll get lucky.
Jeff

"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150