can you use 390 rods with a 428 crank in a 390 block, i was just curious, because someone ask me if it would work and i wasnt sure.

 

The 428 and 390 rods were 100% identical from the factory. With 410 pistons you have a 410!

 

alright thanks, that clears some things up, my dad has a 76 f250 and it had a older car motor put in it which they thought was a 390 but i got looking on the block and on the outside of the block it has reinforced ribs on it, and my book says only 410 mercs had the reinforced ribs on the outside of the block, maybe i should do more checking.

 

I am positive I read that there were 390s with reinforcement ribs too. Good luck. Maybe you'll end up with a 410/428 block.

-Scouder

 

alright thanks for the info, today im going to check the stroke on it so i will know for sure.

 

I've never heard of anything having ribs other than a 427, check to see if the mains are cross bolted, if they are its either a 427 or a 406. Some 406's were cross bolted, but all 427's have cross bolted mains. Ford produced 20 something different casting numbers for the 427, but if you can get me a number off the block and heads I can probably give you a good idea what it is (was). Good luck!

 

it has no casting #'s on the block, im stumpped on this one.