I'm glad snojunky brought up the 1984 indy 400. Everybody seems to forget about the real first indy 400. Every attempt is made to ensure the data listed is accurate.
If you look closely at the pics. They had a few unique things about them. Just picked up a 96 classic for $1000 (american).
The 488 has better low. Plus map bag, saddle bags, rear pack, cover, all the oil he had,. Shop for 1991 polaris indy 400 classic products at dennis kirk. It's just for my kids so i don't care.
It has the 500 liquid. It's been in storage (ok, under a tarp) since '94, and i'd like to get it. In 1986 a bunch of us bought new indy 400s and a few bought indy trail 488s. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur.