5.3 Badge on a Ford?

[MassMustang]

Wait, What!!!! You can bore a BOSS50 20 over? Why did I not know this (other than the obvious "I'm an ignorant idiot" answer). So you're using the 3.75" stroke with the 20 over bore to get 326.06 in3. I was assuming you were using the 3.80" stroke with a 3.700 bore to get 326.86 in3.

The possibility of a clean up bore with the 3.700 is a good thing since I'm christening a BBBoss in the next few weeks. It's not one and done.

Yupp. It's a 3.720" bore and 3.750" stroke. Just no 3.720" pistons on the shelf. So I'm waiting on a special order from Manley.