Could I put a 400 crankshaft into a 390 (Both ford motors.)

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Asked by tstansbro Jun 04, 2013 at 01:19 PM about the Ford Galaxie

Question type: Car Customization

I have heard through the grapevine, to make a 390 a Stroker, you can put a 400
crankshaft into a 390. Now The question is, the 400 is a smallblock and the 390 is a
big block. Now I wanna put a stroker into my galaxie because its a badass car, and I
want a badass motor. And I seen this video on youtube and it was the same car with a
stroker. Got me excited if you know what I mean. This car has been my dads car, my
grandpa's car and I was born in the car. So if its possible, please, let me know. I want
my dad to be proud of it when he gets into it and has the g force shove him into the
seat. Its original California car with a 390/ c6 trans back up.  Any advice, knowledge,
statistics, whatever would be great!

Thanks- Tyler

4 Answers

The bore spacing, or distance between the cylinders is different in the small block 400, it is 4.38" and the 360 and 390 is 4.63" and is NOT a big block. It's a medium block . The big block Fords have even more distance between cylinders, 4.9" The 360 and 390 have the same bore and the difference in cid is the stroke.

1 people found this helpful.
35

No you can't. The 390 (FE Block) and the 400 small block are nothing alike and have no parts that will interchange.

1 people found this helpful.

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