Please help me identify the following manifolds The intake is labeled: A12 - B1374062-1 The exhaust manifolds are labeled: A10 - 137139-1 & A10 - 1376998-2 I believe they should be 430 pieces but am unsure. What would be the correct pieces for a 71 GS 455 built in February? Thanks in :3gears: advance!
Not sure what you have, but... My '71 455 exhaust manifolds are: 1233451 1383848 Both have a 28 cast near the number Intake is: A30 B-1236403 My car was built the last week of January 1971.
1374062 = 67 400-430 cast Jan 12 A 71 intake = 1236403 Generally you might want cast dates in Jan so that would be an A cast. for example 71 exhaust left side would be 1233451, A-1 to 31. A right hand was the same 68-72 ( 400,430 ,455) and = 1383648
That's interesting, one manifold I have is listed as '70, the other isn't listed at all. I suppose it could be 1383648. I was wondering if the 848 was a 648 when I looked at it. Even so, that's a '68 manifold??? These were never off the car.
Thanks guys. Now to find someone who needs 67 pieces and does not need 71 pieces. Much appreciated. :TU:
Ken, It looks like the exhaust manifold information in that chart is incorrect. Number off of my 70 stage 1 Driver side # 1233899 Passenger side # 1383648 I will delete it no sense in having incorrect information here.
