heads and bore

S

spade33

New Member

Nov 14, 2006

198

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0

Tempe, Arizona

May 17, 2007

#1

• May 17, 2007

• #1

so i have a question would the afr 165 cc heads fit on a 289 non roller motor? and if i did that and ended up getting them now could i switch the heads to a 302 out of a 89 later in life? or would that not be any good? also the motor i have i ugess in my 289 is bored 30 over? what exactly does that mean or change about the motor

 

M

mustangdave

My rearend needs a stud and two nuts.

Founding Member

Feb 26, 2002

2,976

1

56

North Carolina

May 17, 2007

#2

• May 17, 2007

• #2

All 289's are non-roller.
Yes, they should work on a later 302.
30 over is actually .030 inches of overbore in the cylinder. When the bores wear, they are overbored so the rings will seal and control the oil.

 

Max Power

Active Member

Jul 31, 2003

1,774

1

36

St Paul

May 17, 2007

#3

• May 17, 2007

• #3

Both 289 and 302 share the same bore. Your biggest issue will be whether the valves hit the pistons.

 

S

spade33

New Member

Nov 14, 2006

198

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0

Tempe, Arizona

May 18, 2007

#4

• May 18, 2007

• #4

so would it be possible to put the afr's on my 289 then later on put them on a 302 from an 89 so go from non roller to roller on the heads or woudl it make a diffrence

 

jtfairlane

New Member

Mar 5, 2006

468

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May 18, 2007

#5

• May 18, 2007

• #5

The answer is YES. The main thing you have to consider is that roller 5.0s come from the factory with pedestal mount rockers, while 289s are stud mount.