Hey fbs63,

Prefix is still getting a parts and pricing list together and I'll get it sorted out on my website as soon as they send it to me.

As for the blocks the one posted on their website is P5155507 with a finished bore 4.125 max bore 4.155.

P5153898 with a finished bore 4.114 max bore 4.185 is also available.

The new updated blocks that just came out are not currently available but I'll get more info of when they do.

I'm going to base my next 426 engine off of one