Casting Numbers for 5.0L Blocks

[Dan Gray]

Im looking at pushing the horsepower envolope on a stock block but i was wondering if anyone knew if Ford made different strength 5.0L roller blocks and what cars were they in or what are the casting numbers?

Thanks
Dan

 

[fastranger347]

they are all the same strength 500-600hp max, yes even the "mexican" if you wanna try to push the stock block, get a stud girdle and try cryogenically treating the block, when i break mine i may do a "cryo" block

 

[r.barn5.0]

I would install some of the valley reinforcement cross-straps instead
or a stud gridle.

Block is weak in the valley, not on the bottom end.

 

[Modular2v]

all a girdle and valley reinforcements are going to do is hold your block together after it cracks!!!!