360 or 390???
Senior User
Joined: Mar 2002
Posts: 288
Likes: 0
From: Farmington MN U. S. A.
360 or 390???
[updated:LAST EDITED ON 04-Oct-02 AT 09:10 PM (EST)]I like that!!! Nice and clear...But just so i have this straight....To go from my 360 to a 410, I will need a 428 crank,short rods from a 390 or 428 and the flywheel from a 428...Right? 
Also, can I use the same clutch? Am I buying 390 skirted pistons or 428 pistons? Thanks again!!!
Also, can I use the same clutch? Am I buying 390 skirted pistons or 428 pistons? Thanks again!!!
Elder User
Joined: Aug 2001
Posts: 962
Likes: 2
From: Collierville, TN
360 or 390???
Yes, you have it right. You can use your same clutch. For pistons in a 410 (360/390 stroked with a 428 crank), I recommend Sterling 390 truck pistons. They have a moderate dish and will give you around a 9:1 compression ratio depending on what heads you have. They are available from Summit and other places for around $12-15 each.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
360 or 390???
Do these Sterling pistons come in a particlular over-bored size, or several sizes. I.E. My 390 is currently .020 over. Is it posible that the right type of piston was used when it was rebuilt? (I was not resposible for that rebuild.) What is different about the piston from a 390-410?
Elder User
Joined: Aug 2001
Posts: 962
Likes: 2
From: Collierville, TN
360 or 390???
Most "off the shelf" pistons are available in a range of overbore sized. The most common sizes are standard bore, .030 over and .060 over. Sometimes you will see .020 over as an "off the shelf" size.
410 pistons and 390 truck pistons are the same thing. They have the same diameter as 390 car pistons, but they are shorter and have a slight dish. You can't use 390 car pistons in a 410 without cutting them down, or they will stick out the top of the cylinder.
410 pistons and 390 truck pistons are the same thing. They have the same diameter as 390 car pistons, but they are shorter and have a slight dish. You can't use 390 car pistons in a 410 without cutting them down, or they will stick out the top of the cylinder.
Freshman User
Joined: Jun 2002
Posts: 48
Likes: 0
From: Poolville, TX
360 or 390???
One more question from me; you say that the flywheel on a 428 is weighted to balance the 428 crank, is it possible for say, a machine shop, to add weight to my existing 390 flywheel for use with the 428 crank? Would this be an exspensive operation? Just a theoretical question. Thnx.
Elder User
Joined: Aug 2001
Posts: 962
Likes: 2
From: Collierville, TN
360 or 390???
You can weld a weight onto a 390 flexplate to use it on a 428. I assume you could do the same thing to a flywheel. The problem I've seen is that the welding tends to warp the plate and create problems. If done right, however, it should work fine.
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