Its sounds to me that you may have the short manifolds pictured below, and these were/are also found on 350 HO originals.


This particular set was bought off of Ebay by yours truly just two weeks ago. The poor fellow selling them did not put a reserve price on them, I watched for a few days, nobody bid, I said what the heck and bought them for 31 dollars. My current manifolds, as most people here know, look like they were found on Mars after being left behind for 1 million years!!

I know everyone loves the long-necks, but your HO may have had these coming off the assembly line. Current price in REPRO is well over 200 bucks.