I've forgotten to post this update here. So here you go!
I test fitted body interior and chassis together. Chassis was too wide from rear because there are those pieces of plastic behing fender skirts. I must sand a bit of plastic from interior, now it doesn't fit very well... Grille is from '57 Fairlane (Custom part) and I'll glue bit of styrene to side. I have sanded body, the other side isn't still ready... It's just so boring..