[bryan eidins woking,surre]

can anyone tell me the original bore size on a 1985 360ci block
many thanks bryan

[dave-r]

I don't know much about 1980s stuff. Is this engine the same as the old LA block or is this one of these newer Magnum engines? The old 360 had a 4" bore. That is 40thou smaller than the 340 bore but it had a longer stroke. I don't know when the new Magnums came in or if they have the same bore and stroke or not.

Any one else know?

[Marcus]

1985??? Sorry Im stuck in 1972....I can't help

[Ron S]

Hey maybe the third times the charm. Per "How to Rebuild Small Block Mopar Engines", the bore is the same 4.00 in. The only difference I can tell is the 71 360 had a piston to deck clearance of.074", the 72-86 deck clearance was .067". The compression height on a 71 was 1.584" and on 72-86 it was 1.591". Hopefully this book is accurate