Hi guys,
I'm looking for tips on how to distinguish chassis parts (e.g. tubing) made of mild steel and 4130 CrMo.
I'm convinced my 173" FED (late 60's/early 70's era, believed to be a SPE chassis) is plain mild steel but I wouldn't mind knowing for sure.
2nd question:
Let's say my chassis is mild steel and it needs a front-half... would it make sense the front-half with CroMo? Weight wise, it probably doesn't, because being a vintage FED the engine isn't very far out and it requires a heavy front end to keep the front tires on the ground.
PS.: The car is currently not SFI tagged, but I consider it an option in the future.
Thanks as always. I'm so grateful for you guys taking a break from the fab shop to share your wisdom here.