Hey Packard guys! I have some questions about the differences between the 5 main and 9 main 327s.. I picked up a 9 main to build for my '53 Clipper and maybe hop up a little. It has one bad piston and a few bent valves. Are the pistons for the same as in the 5 main motor? Thanks in advance!!
I think they used the same pistons in all 288 and 327 engines but these guys would know for sure. Packard Motor Car Information - Packard Forums
There was a difference in the compression ratio between the 5 main and 9 main 327's even though the bore and stroke were the same. I don't know if this difference was in the head or the piston though. Rusty is spot on, check with the Packard Forum
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