Ok, Here is the question... I need a new cast iron intake ( which I believe I can locate locally here in Oregon ) for my 70 GSX Stage 1. Do you Buick brothers know for sure if the 70 through 72's are all the same intake manifold ? I don't want to put on a incorrect year on my X. Thanks, Eric
Easy... GM#1231718 for all 70 455's, right on top of the manifold.:Smarty: 70 is different from 71, 71 is diff from 72.....but they still should bolt up.:bglasses:
Just went through that with our 70 GSX stage 1, 4 speed resto. Since most of these were made March through June of 1970 you will need not only need the 70 part number but also a cast number that predates your car's build date. So if yours was built say in April you would want a C or B month cast date which is right above the part number. http://www.v8buick.com/showthread.php?s=&threadid=49215&highlight=1231718
I have a '70 cast iron intake if you can't find one. Don't know the casting #, but will check if you are interested.
