I was reading in a book that you can take a stock 390 and put a 428 crank in it and make it a 410.

Is this true and if so what else has to be done?

 

This is true. You need 390 rods, 390 truck pistons, and a 428 crank, and you have a 410. You will also have to get the block rebored to remove any ring ridges since the piston will travel farther.

So if you have a truck 390, you can put a 428 crank in it and have a 410. Just get it overbored and use appropriately sized truck pistons.

 

ohhhhh

then since you can do that

can you bore a 390 block to a 428

 

it depends on the wall thickness and core shift your best bet is to find a ft block to do that

 

Very few 390 blocks can be taken out to 4.130" bore thats .080" over standard...

If you have a 390 block and want to try a 428 bore in it..I suggest you have it sonic checked to make sure after the bore job..you'll still have enough Cylinder wall on the thrust side of the Cylinder..Usually about (.100") Minimum..

Russ

 

428 and 410s are externally balanced, 390s are internally balanced. So in addition to what was listed by Kurt above, will also need to replace the flexplate if you convert a 390 to a 410 by using a 3.98" stroke crank from a 428 or 410. Figure another $50-100 depending on who/where you get it.

Biggest problem with building 410s out of 390s is that 3.98" cranks aren't cheap (whether Ford or SCAT) and there are few piston choices (need 1.66-1.68" compression height). I looked into this also, but decided to stick with the stock 3.78" crank. If I were to spend the cash to stroke a 390, I would go all the way and get a 4.125" or 4.25" stroker kit with new rods and custom pistons. There are several folks selling these kits for $1700-1900. Too much for me right now.

 

Duh, I forgot to mention the balance issue. If it were mine, I'd take the crank, rods, and pistons down to the machine shop and have 'em internally balance it. It will be somewhat more expensive, but you get a more stable motor when you're done.

The Silvolite 1139 looks like the ideal piston for this engine. It would give .030" deck clearance, and with .018" thick head gaskets would give you .048" quench distance. Figuring it has a 15cc dish (guess) with 73cc combustion chambers, it would give you a compression ratio of 9.66:1. That's pretty good IMO.