Machining a block, how it´s going???

moper said
360Z - no need for the added block expense for this engine. Simple main studs and good machining and it will live just fine. Plus I was pleasantly surprised at how thick the bores were. Only one hole had core shift and it wasn't too bad. This block's going +.040 but it could go .060 with a 4" arm and have plenty of meat left. of course, that would mean a true custom piston by industry standards and again, we're sticking to a budget.

a while ago i picked up some late 70's 360 blocks from the local bone yard..
picked one at random at sent it out to get:
1. the bores sonic tested.
2. measure everything up.
2. decide on the machining.
turns out that minimum water jacket thickness between the cylinder bores is .150" and that the minimum thickness between
the cylinder bores is .125". you can calculate the maximum bore allowed on a given bore center. using a small block bore center
of 4.46", the two minimum bore walls calculate to .275" .180" in the major thrust direction .095" in the front-to-rear direction
and then add in the water jacket .125" for a total of .400", which means that the biggest bore possible with a water-jacket
is 4.115” and still keep a margin of safety. i bet that the other cylinder blocks are simular. prolly in the 4.08-4.12 range. this was
a virgin casting..