Do or DONT fiberglass body parts

$35-40k in a ‘66 Valiant? You blew past any cost to value roadblocks about $20k ago.

What is the car about? Race car?

A fiberglass hood is one thing but once you start putting fenders, bumpers and a deck lid on you’re crossing the line into dedicated race car territory.

Couple points - ‘glass bumpers are tough to chrome and (IMO) look terrible when painted. ‘glass fenders will take a LOT if work to make them look like regular factory steel ones. Headlight mounts or any trim will have to be put in. How do you plan to attach the hood and deck lid? Keeping the hinges or pin-on? If keeping the hinges it’s almost pointless to go with ‘glass since the hinges account for a lot of weight.

This car would have to be something special to get even half your investment back. The market for expensive, modified ‘66 Valiants is going to be pretty small.