Head Casting Number

[Choppers]

What are the numbers for the newer heads that aren't prone to cracking. I need to know so I can tell if these heads I am looking at are the newer ones.

[ssms5411]

Re: Head Casting Number

4781 is the newer heads.

[Choppers]

Re: Head Casting Number

Ok. These the new ones then. I knew you knew them Steve because I remeber you telling someone on here you had the head numbers. I looked through threads but couldn't find where it was stated. Thanks you.

[ssms5411]

Re: Head Casting Number

Make sure they power blast the heads if you take it in the machine shop , they will flush out the coolant passagies and it will look like new. Then they can do a P/P , milling and valve job.

[Choppers]

Re: Head Casting Number

Me and my grandmas boyfriend is doing the p&p. He use to do it for a living. Only problem is he sold his flow bench recently. I am having the heads milled .005. Yea I was going to have them blasted for sure. Problem is finding a shop close to me that will do this stuff. Being in Jacksonville you would think we had tons of places but we don't. The ones we do are horrible.

[Choppers]

Re: Head Casting Number

Also should I get them blasted, milled and 3 angle valve job done before we do the p&p or after?

[ssms5411]

Re: Head Casting Number

P/P them first, then valve job, mill and then blast them so theres nothing left in the heads, no metal or anything in them.

[Choppers]

Re: Head Casting Number

Thanks for the reply. I was thinking the opposite order. Thank god you replied.