are convertible seats different from hardtop? looks great how did you get all that meat under rear what is tire size and rim width please put add on kijii seems guys in Ontario have parts I got grill from there

http://www.kijiji.ca/v-other-auto-parts-and-accessories/barrie/64-69-beaumont-and-chevelle-interior-parts/350984526?enableSearchNavigationFlag=true

-- Edited by marshalldude on Tuesday 14th of July 2015 10:36:43 AM

Yes , you need a convertible chevelle or Beaumont rear seat (narrower)
Talk to Dave (The Tin Man Auto in B.C.).
He can tell you what years fit.
Could be 64 - 67 frame.
Nice build !