81 Riviera speakers

[LSTTYPE]

I know it's not a GN or Regal but I thought I'd ask you guys for input. It's an 81 Riviera with I believe 6 speakers. 2 in the doors, 2 in the rear deck, and 2 in the rear sail panels. It needs all new speakers and I'm thinking about a retro sound head unit. Anyone know what size speakers are for it? Any suggestions would be appreciated. Thanks

 

[1986 Buick GX1]

I have no idea what size speakers you need, but I like the Infinity reference series speakers. They are reasonably priced, have one of the best signal to noise ratios so they they sound good with minimal power and sound even better with an amp.