LA blocks

Locomotion said

Has anyone ever weighed the different LA blocks (preferably virgin) to perhaps get a hint of how much metal difference each has or have the resources? (early 360, late 360, '80s pre roller, roller blocks & Magnum) Add sonic testing the cylinder walls and a clearer picture may emerge. (Preferably with the same scale & test tools to eliminate calibration variances.)

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I never did a weight or cylinder wall thickness comparison with another block but when I built my 408 I used a 360 block dated march 73 and had it sonic tested and my machinist said it had some of the thickest cylinder walls he'd seen and he'd been testing them for 40 yrs. It's been over 12 years so I don't remember the exact thickness of the walls but he said if I had wanted to bore it .070 over (to use .030 over 340 pistons) it would've been fine. Since it wasn't a race application I just went .030 over. Hope this helps