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Thanks for the information, even though mine is an extremely low mileage original never been apart engine, it was fitted with air conditioning early in it's life and they installed a double belt pulley and changed the bolts.

Anyone else have any input?

I'm about to commence the reassembly of an April 1968 327 with a single belt lower pulley and need to find the three correct bolts/ washers which hold the pulley to the harmonic balancer.
Has anyone got pictures of head markings for what I need.
Thanks in advance
Frank.

No problem Joe...a very original engine still has it's original distributor cap and rotor...fan belt... heater hoses etc...a wealth of information.
All the best Frank

Original fuel pump from an April 4th assembled Tonawanda 327

Side of block

Engine number

I'm restoring an April 1968 327 for an Australian Holden.
Engine was built at Tonawanda and this is the first disassembly of the low mileage engine.
Please look at the crayon markings and help me work out what they could be.
It's obviously not H5 like the suffix. Has anyone come across anything similar to this?
Thanks in advance.
Frank in Australia