78 WS6 TA.On the block where the cubes would normaly be is XXX on the back of the block XX with date code 481S88 serial # Z8N150787(which matchs the VIN) heads are 6X8s.Would any body be able to tell me what the h311 I have here I realy dont want to tear it down,it runs fine.I am assuming this is a 455 due to the heads.Please help,I know head gaskets are cheap but why mess with some thing if its not broke.
Thank you,
Dave
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