Yep, those are the 75-76 HP manifolds--not as good as the earlier ones, but okay. You probably have one of those late model engines in your car. <span class='smallblacktext'>[ Edited Sun Aug 23 2009, 12:32AM ]</span>
The PO claimed the engine was out of a 75 New Yorker and the casting # on the block matches. I already have a 2863409 manifold. For the right side I'm still looking. Is the 2806900 best or is there a later manifold that is equal?
Joined: Sun Feb 26 2006, 08:46PM
Location: Kingston,Ontario
Posts: 5622
Some of the early right hand side casting HP logs were prone to cracking. (I had seen a few repaired and worked) They crack between #2 and #4 and the ears can break off if overtightened. The 70-73 castings hold up better,IMO. They look the same and the only difference is the mounting flange is clocked differently. As requested,here is my 3751071 73 HP log that I plan on using on the BoaB
<span class='smallblacktext'>[ Edited Sun Aug 23 2009, 02:47PM ]</span>
That part number on your manifold is 3751071 (not 875....) You can also use pn 2899879 which is similar (it uses the same downpipe).
So now you have three different right sides to choose from: 2806900, 3751071, or 2899879. Any of these pop up on Ebay all the time--keep a lookout. And since you have the good drivers side (2863409), as soon as you find a right side one you'll be able to put on one of the excellent TTI systems. <span class='smallblacktext'>[ Edited Sun Aug 23 2009, 02:22PM ]</span>
Don't forget to get a pair of these spark plug heat shields that bolt on under the head bolts--they will save your 5/7 and 6/8 plug wires from being fried by the HP manifolds. They are the same for both sides if you haVe the C body manifolds.
Joined: Sun Feb 26 2006, 08:46PM
Location: Kingston,Ontario
Posts: 5622
I would like to add that the right valve cover is different between the lo-po and HP cars. The valve cover accomodate the last spark plug wire at the back of the motor. IIRC,there is also slight variation in the plug wire separators as well. The turquiose cover is the lo-po.The orange one is the HP (It was originally turqouise.Somebody painted it.) The lo-po has a bracket for the last two wires.This bracket does not clear the HP log.
<span class='smallblacktext'>[ Edited Mon Aug 24 2009, 09:02PM ]</span>