[Cliff R]

I would NOT use a 557 block for a stroker project for any reason. It's been at least 15 years now but a member of this Forum did exactly that. He built a relatively "mild" 455 based on the later 557 block, iron heads, RAIV size cam, about 10 to 1 compression. It didn't last very long at all, cracking the block where the main caps bolt down. The early blocks are still out there, I just sold two recently, I'm sure there are a few still around in your area if you do a search for them.........

[78w72]

Originally Posted by Cliff R

I would NOT use a 557 block for a stroker project for any reason. It's been at least 15 years now but a member of this Forum did exactly that. He built a relatively "mild" 455 based on the later 557 block, iron heads, RAIV size cam, about 10 to 1 compression. It didn't last very long at all, cracking the block where the main caps bolt down. The early blocks are still out there, I just sold two recently, I'm sure there are a few still around in your area if you do a search for them.........

hes not bulding a stroker...

a 557 block is perfectly fine for a low hp street cruiser. if youre building it to 400+hp &/or racing or abusing it then find an earlier 400.

[Jays76bird]

A lot of good info on here, I like Jay S halo approach.
The guy hasn't gotten back to me on a time to even go look at the block. Getting frustrated with Facebook market place as a parts source. I had a guy last month jerk me around for 3 days on a 76 trans Am rear end before finally telling me he was listing for a buddy and there was a pending sale. I still have the 350 motor. I like the butler stroker kit but it is expensive probably due to the custom pistons.
I was looking at buying a 4 inch crank, the rods, and sourcing the pistons myself but you still have to figure in balancing.