Are ARP head bolts really needed for a mild build?
I have reused the factory 340 main bolts 3 times now.
I buzz the motor up 7 grand.
The bolts are not going to break with the build you have.
the only bolts I ever up grade in 'stock stroke' street/strip motors are the rod bolts.
I only use main studs in stroked or above 7500 rpm motors.
I run the same kb243 pistons , use ported heads, solid cam, and have a 4 spd behind it.