Th mopar guy
the mopar dude has made his living with these old cars since mid 80's . small deal, nothing big time I call it. I personally have never had a bad deal with him. I saw whee a member neded a custom made whell quick last week and got them from him fast and said he was happy.
340??? like said be real careful what it has already been bored out to. I would think you can find one closer???