help guys!

If you get one head, you need to match chamber volume as well as valve size= . Also, you need to determine if it has been ported at all....you will want= the flow the same intake and exhaust.

If it is a stock unported head, you should be able to match it.

You are looking at $400 for new heads...minimum.=20

As far as replacing just the guide, they have up to .010 oversized guides a= vailable. You need to determine what size was in there, and whether you wil= l be able to clean it up to get a proper fit with an oversized guide....ass= uming you can smooth the chamber somewhat.=20

Really, there is no way to make any kind of accurate determination without = hands on inspection.

Perhaps talk to a local cylinder head rebuilder?

You can look for used heads, but if they are in good shape people seem to o= vervalue them.=20

as valve

all....you will

it.

oversized guides

whether you

oversized

determination without

people seem to

Thanks for the input Gareth. Hating life at the moment, as this A.M. I ordered heads and cylinders/pistons from John at aircooled.net, and this afternoon got a call from my little 3 year old's mom, that she was just admitted to the hospital, with an (apparently) serious infection in the eye socket. Had I known a few hours sooner, i'd have used the money for an airline ticket.

At any rate, I decided to buy new jugs and pistons, and a pair of new heads. Hopefully, the bottom end wasn't put together as poorly as the top.

Thanks again for your input.

Chris

Love people, use things. Never get it backwards.

well you went the "correct " way... now you'll know it was done right. You still need to compare chamber volumes old head vs. new head, and check what compression ratio you end up with... then try to see what cam is in there (pull the oil pump out to see markings at the end of the cam). CR needs to match the cam.

I am very sorry to hear about your personal tragedy...I have spent way too much time in the hospital the last few years myself.

Suffice to say, you have my well wishes.

To get back to technicalities...as an aircraft mechanic, you should have access to decent measuring tools.

Why throw good money after bad?

Split the case and start measuring.

If it specs, roll with it..if it doesn't dump it.

Check each piece.

Do not slap a new top end on an unknown bottom end.

well

match

and

this

with

known

pair

as

done right.

head, and

see what cam

end of the

Jan - I see a bolt-on cam gear, but no markings on the cam :(