Quote:
Originally Posted by AndrewA
...there seem to be a multitude of choices for 318 engine
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Andrew, you may be seeing exhaust manifolds/headers available for the later 'LA' series 318 engine, whereas you have the earlier A series 318, commonly referred to a the "318 poly engine". The manifolds for the two engines are not interchangeable.
Unfortunately, the LA series small block engines became commonly referred to as A series engines, which naturally causes some confusion!
There are some new stainless steel headers available for the poly 318, but they are usually made for racing applications and specifically to fit early Mopar B and C body types (Chrysler, Plymouth, Dodge), which are much larger than our narrow Bristol bodies.
Indeed, secondhand poly 318 cast iron manifolds can often be found on ebay with asking prices in the hundreds of dollars.
I doubt you will find any new manifolds/headers 'off the shelf' that will fit your Bristol 410. If you do, please share!