Hi guys , I have found a GMH stamped engine numbered 350 engine complete long motor that has been in storage for decades , I was told when I inquired to look at it. It has a date code of 6/ 69 on the block , the following is where it gets interesting it has a pair of the 041 date correct cylinder heads. interestingly they have have a identical number stamping which might a job # or a blueprint code on the machined area oil area valley side of springs. But the block has a casting number 3956618 17/6/ 69 build ,4 bolt mains with baffled trap door oil pan. GMH stamped # on drivers side on the front of block is correct stamping font of the day . 350 77015 gm numbers T0617 (bear in mind that block was faced at its last build) GM stamping is clear but GMH stamping is just visible with the exception of the space after #350 which has the correct space for M but has gone with deck face machining. This casting number is a Z28 69 block / 350 hi-performance when you decode through the GM bible in the states. I have traced back through the last two owners of the engine, who has told me he had a HG Bathurst Monaro which he bought when he was 17 years old , he is now 64 years of age. He told me he sold car to a mate who pulled the engine out and rebuilt it in the day but only drove it for a couple months then pulled it and put a big Block in it. The motor was put into storage from that period to which now I have in my possession. I have seen treads dating back to 2007 of a guy wanting to find his original HT 350 block and he has quoted this casting number that was in the car before he sold it back in the Day.
This engine is as new as I was told by the owner mentioned above and I have stripped it down to investigate. 60 Thou over flat tops / balanced still has cross hatch marks on the bores and pistons still have the new alloy look around top perimeter. So what have been told to date so far has found to be correct. Cylinder heads are still press in rocker studs with 202/160 valves and are as new. I believe this is the real deal and need someone to finalize my thoughts.I have researched through GM in America who have a thread that this block casting number was imported in 69 to GMH Australia.
Can you help.
Regards
Paul From W.A
0408996337

thanks for input , much appreciated . Knowing the cast build dates as shown and allowing a shipping time frame to arrive in Australia would you say HT or HG model fitment.
Also the numbers after 350M I have been told make this an Adelaide build car ?
Regards
Paul