Went to the machine shop yesterday to see how the new engine was progressing. The short block is complete. The forged 390 pistons had to have the tops cut so the tops would not stick up past the decks. I already knew that would happen with the 428 crank. Bought a new eagle crank cause the old one was scratched and bent. The block. Rods and lifter bores were honed and the cam degrees. He was checking the heads and valve clearances yesterday. The intake will have to be test fitted also because the dark was cut. So far 2500 dollars in machining and parts. I probably could have switched to the 460 for what it's going to cost to do this fe. Too late now. I stacked up on fe blocks.

I went .040 on a mirror 105 390 block, 418 ci. Using 428 crank and rods. The shop will start fitting the pistons and balancing the rotating assay before assembling the short block. Im using 2.15 and 1.72 valves so the reliefs have to be enlarged for the lift I'm using. I'll post as the build goes along.

The Mahler pack is an .030 piston.

I meant raised the pin to lower the piston.

The deck was cut .020. I do have larger valves but he will modify the pistons to fit and cut my intake for proper fitment if necessary. I'm using my 428 eagle crank and rods. It comes out to about 421 ci I think.

The price is good and the only time my car goes over 6500 is when running 1/4 mile. I'll mention them to my machinist and see what he thinks. Thanks

Looking for suggestions on .040 forged pistons. Would like to keep the compression where I can run pump gas or mix half and half. Thanks