Does anyone have the engine specs on the old crate motors. Picked up a used one that a guy spun a bearing in. Before I go to far with it does anyone know the cam specs and what the cylinder bore is? The motor doesn't have any ring grove and it appears to just need the crank polished so far.

pretty much a stock long block Magnum with a bigger cam and single plane intake.

http://www.hotrod.com/how-to/engine/mopp-0303-360-crate-engine-buildup/

.020 over coated Pistons, I'll get the specs on the cam, they're at home

When the engines were being produced I understand they were just pulled from the production line. So bore would be 4.000" Later on, when the 5.9s weren't being produced, they used used blocks which required oversize pistons. Then when the $10,000 Mag crate motors came out they used replacement blocks and back to 4.000".
That's how I remember it.

R.

Cam Info I have:
M.P. P4876348 (380 & 435 HP Crate Motor)
Advertised Dur. 288/292
Dur. @ .050 230/234
Lift(1.6) .501/.513
Center Line 108 deg.
Overlap 74 deg

thanks all