Edelbrock RPM Heads

65fastbackresto

Active Member

Apr 13, 2007

1,229

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AR

Jun 1, 2007

#1

• Jun 1, 2007

• #1

They say on the box to be used on a 1979 to 1995 motor. My engine builder said I could use a pre 1979 block if I had to because the gaskets are the same. This sound right?

I had a 1980 motor found, but when the guy went to pull it out, it had a hole in the block. Now I`m back on a motor hunt. My builder wts a pre 1981 block cause the cranks are stronger. So now I`m having to find a 79 to 81 block and it aint easy, made bunch of calls already.

 

jb1dsl

Member

May 24, 2004

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0

17

Marianna, Fl.

Jun 1, 2007

#2

• Jun 1, 2007

• #2

you can use them on any 221,289,302,351. I have them on my 66 289 right now

 

65fastbackresto

Active Member

Apr 13, 2007

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Jun 1, 2007

#3

• Jun 1, 2007

• #3

Cool

That helps me with my motor selection then, thanks.

 

Max Power

Active Member

Jul 31, 2003

1,774

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St Paul

Jun 1, 2007

#4

• Jun 1, 2007

• #4

I have them on my 39 351w based 393. No problems.

Whatever motor you find, you may have to replace the crank anyway.

 

brianj5600

Active Member

Sep 19, 2003

1,964

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39

Middle TN

Jun 1, 2007

#5

• Jun 1, 2007

• #5

221 only has a 3.5 bore. The valves might hit the cylinder. I doubt he would find one anyway. Even the 260 has 3.8 bore, but again they are not as common as the 289 and 302. The 255 from the 80's has a reduced bore too, IIRC.

 

65fastbackresto

Active Member

Apr 13, 2007

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Jun 1, 2007

#6

• Jun 1, 2007

• #6

It`ll be a 302 for sure

I`m starting to lean toward a stroker kit, but I dont know if the stroker kit would have the old stile crank pre 82. It has a 2 peice rear main and the crank is alot stronger.

 

68stang351

Founding Member

May 16, 2002

850

9

39

Savoy TX

Jun 1, 2007

#7

• Jun 1, 2007

• #7

brianj5600 said:

221 only has a 3.5 bore. The valves might hit the cylinder. I doubt he would find one anyway. Even the 260 has 3.8 bore, but again they are not as common as the 289 and 302. The 255 from the 80's has a reduced bore too, IIRC.

Click to expand...

I've got one in a 63 Fairlane! Don't know why anyone would use one in a performance application though.

 

Max Power

Active Member

Jul 31, 2003

1,774

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St Paul

Jun 1, 2007

#8

• Jun 1, 2007

• #8

65fastbackresto said:

I`m starting to lean toward a stroker kit, but I dont know if the stroker kit would have the old stile crank pre 82. It has a 2 peice rear main and the crank is alot stronger.

Click to expand...

When you get a stroker kit, you get a new crank.

 

D

D.Hearne

New Member

Sep 29, 2000

11,730

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south louisiana

Jun 1, 2007

#9

• Jun 1, 2007

• #9

Avoid the early 80's 5.0 50 oz/in cranks. The later 87-up 5.0 cranks are fine, the casting quality is so good they look like forgings. I've spun em to 7500 with no special prep other than ARP rod bolts.