The auto parts guys will think you are an idiot. Been there many times. Luckily I have a parts guy that knows his stuff. Still have to fabricate my own stuff.
Years ago (young fool) I had an Anglia with a big block in it. Rear brakes only. About Sh--T my knickers a few times. Not the thing to do.
Modern day.. You won't be able to get insurance on it.