To complete the discussion listed below are the cost of the parts that I'm planning on using to build a stout bottom end for the vortec.

All prices in US$

J&E pistons 120.56 + 26 for thermal barrier

Crower rods $1158 for 6

Darton sleeves $737

Bearing and rings will add $300.

I'm getting quotes for machining the dry bore walls for the darton sleeves this week and will post.

The head work is limited to changing the valves to inconel, doing a bit of porting on the exhaust side and installing heavier springs. I don't plan on a valve job unless needed as the head is low mileage. Just a quick hand lap and done.


51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them