Hi All, First time poster here. I have been trying to find information on the Pioneer FW-155 flywheel. It does not cross reference to the 326, but it does the 400 and all the specs seem to suggest it should work on the 326. Anybody have some first hand experience of actually installing one of these on a 326? My current flywheel is heat cracked bad and cannot be turned down anymore, its an original 1967 GM 9779232 . The register is 2.75 and its a 166 tooth. I dont need an SFI nor do I want to pay a premium for one. Just looking for a stock replacement. Dont suggest the Luk LFW-131. That flywheel does not even come close to what is advertised. I had a look at one a local supplier brought in and its a 2.5 bore, and its outside dia is way smaller. The installation bolt holes were smaller as well. Luk product support is of no help. On a side note whats with this internal /external balance thing. Eyes are going buggy trying to get to the bottom of all this.