Nothing visual yet for cracks,pulled all but rear one.I`ll post another pic but everything is washing up fine except for the rust in the valley.No ridge and hone marks right to top.Measures 3.875(324 cubes).Rod throws all look nice so far but some staining on mains.

Looks like hi comp pistons alright. Before you spend money on the block, clean it up well & check for cracks, especially in the mains area. Over tightening the main bolts on 312s led to disasters sometimes.. Good luck.   


Paul

By the way its a Canadian 57 block "VV" 1058...

  Plan is to strip and clean it for now.I hopeing I can re-use most everything,although I was told it would only run on AV gas so that has me a bit worried.I have to pull it apart first and see what I have.I have been trying to purchace a real nice 57 tudor that would be a nice home for this.Or maybe my weldin truck...

So whats the plan for this goodie?

Oldmics

By the way that's 40 yr old grease in cylinders,very little surface rust.

Thought I better share,a little bit of horse trading and I ended up with this early 60's build 312 this weekend.std bore 312Ported and polished "G" headsdeep sump pan
Everything looks very unused,very tight timeing chain,clean bottom end other than mouse house causeing some discolouration on throws.Also mystery cam that's I have not pulled yet.
Finally feel like I have something of interest to share to group.
Dave