74 duster 360 factory rim size?

rally said
I was thinking the same but when i do little research I seen some mopar VIN typo, but never seen one with the engine code(5th digit) typo.

VIN stand for Vehicle Id Number. Insurance company look at VIN to determine engine size, we know back in the day insurance cost more for big block than small block. How can owner agree to pay more for insurance if he has small block in the car? Anyone can explain?

Fender tag, match numbers to verify the original engine is in the car. That or just charge you for the largest engine that could be had for that model (in which case would be the 360 because it's a 74). All that said I'd still stuff a stroked out 400 in that and have at it!