I know this question has been asked before many times, and many ways, but will this wheel fit well on my civvie 84 caprice?

http://store.summitracing.com/partdetail.asp?autofilter=1&part=USW%2D94%2D5834&N=700+400354+304801+4294906455+4294793325+42947950 98+115&autoview=sku

15" dia.
8" wide
5 x 4.75 bolts
3.75 backspacing
-19 mm offset

i was planning on using 265/65/15 or 255/65/15 tires

Should. Call Summit and ask them.