Desotos share alot with chryslers although that rear glass has to come from a Firedome or possibly Firesweep. The Fireflite has a larger rear glass. There are Chryslers that share that glass also, just can't remember which model. Fenders, doors, quarters, deck lid are the same. Trans, rear end , front suspension also. The 341 in yours is essentially a 330 from 56 bored out. Firedomes and Fireflites are very similar although Firesweeps are based on a Dodge platform instead of Chrysler. I have a 57 Fireflite ( actually my wifes). It's been a great car to drive and is usually the the only DeSoto on hand at most local shows. Good luck with yours. if I can figure out how I'll post a pic of ours.