[ChrisAunchman]

I have built a few 302's I am actually getting ready to put together a 289 motor. I am looking for a rebuild kit, every kit I see says 289/302, the problem is the pistons are the same??? I thought the 289 piston was different than the 302 piston for some reason, I know the rod and crank is. I even went on Federal Mogul website and they are giving me s HP273 part #? Which is what I always use on the 302s.......

 

[Motorhead]

Yes 289/302 use exact same pistons... the difference in crank throw is made up for in the length of rods.

 

[ChrisAunchman]

AHA.......I learned something....its wierd cause KB use to have a different listing for the 289 piston, that is why I thought it was different

 

[mustangboy]

I have a "FORD PERFORMANCE" book by Pat Ganahl and it says the aftermarket 289 pistons will hit the crank if used in a 302.It says the skirts and pin boss area need to be milled slightly for clearance.The pistons they are using are TRW L-2218..I think the info is pretty dated though since they are using this piston because there were no flat tops available for a 302 at that time...I'm sure now that the 302/5.0 is so popular they just make the pistons to fit the 289 and 302.The info might still be true if your using old parts though.

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1968 mustang 306,stock ported heads,650 Holley DP,weiand Xcellerator intake, Comp cams Magnum 292,[email protected] and 518L,heddman headers,4speed with a 4.11 detroit locker.13.69 at 101 mph.

<font size=-1>[ This Message was edited by: frdnut on 5/16/06 4:27am ]</font>