Im having Head Problems Lol! I Recently purchased a CJ basket case...my questions are with the motor and heads the engine is stamped 343 between the freeze plugs so that's pretty plain and simple...the heads however are stamped #3231480-2?????? No idea... found another set of heads In back seat #3188558-1 that have been shaved and huge valves???? Please help with any info!!! Thanks in advance!!!