LOOKING FOR SOME ONE THAT HAS PLAYED THE NUMBER GAME WITH SOME OLDER SPORTIES. i HAD A BASKET CASE AND DECIDED TO START OVER. BOUGHT A NEW BLOCK (3A30508H2) THINK ITS A 72. GRABED A SET OF HEADS FROM A FRIEND (16682-71 & 16684-71) WONDERING IF THIES HEADS ARE COMPATABLE WITH THE NEW CACES. ALSO IIF ANYONE HAS ONE OF THEIR OLD BOOKS AROUND LET ME KNOW WHAT NUMBERS I SHOULD BE LOOKING FOR TO GET THE CORRECT JUGS FOR THIS PROJECT. THIES WILL HELP ME FINALLY GET MY CHOPPER TOGETHER, THANKS.

 

Like I said in reply to your other post, the '72 models are different.

1957-1971 cylinders - front: 16464-58 rear: 16465-58

1972 cylinders - front: 16464-72 rear: 16465-72

1973-1985 cylinders - front: 16464-73A rear: 16465-73A

The '72 1000cc head bolt pattern is different than the previous 900 cc, and also different than the '73 and later 1000cc pattern. And just to really confuse things, some early '73 models used '72 cylinders and heads.

Your crankcase numbers indicate a '72 year model. The cylinder bases are different, but there are only 2 versions - 1957-1971 and 1972-1985. This is according to the base gasket part numbers.

So, to sum up what I've dug out of my catalogs: '72 crankcases can use '72 - '85 cylinders. You'll have to match the heads to the cylinders - '72 heads can be used only on '72 and some early '73cylinders; '73 - '85 heads can be used on late '73 - '85 cylinders.

From all this, I do not think you can use the '71 heads you have on the '72 crankcases, as the '71 and earlier cylinder bases are different, and won't bolt to the '72 and later cases.

Geez, my head hurts!

 

Skip I got to thank you agian you are a welth of info. I checked out that site and I am wating on a reply I guess you are a little faster. now i just have t find if the heads that got from my friend will work (16682-71 & 16684-71). does your book say I can use thies, my friend says they are 1000cc heads but i would like to be shure. I 'll have to send you some asprin for your head. Thanks agian boss.

 

I can't find the part numbers anywhere in all the junk I have for the 1000cc heads. I was assuming the -71 number indicated 1971 heads, which are not 1000cc. But HD has been known for changes in mid year production, so I can't say for sure. Hope someone on Sportster.org can offer more info.

 

Skip thanks for all your help, you save me a ton of time triying to find a web site that didn't exist. I'll have to send you some picks of the bike as it unfolds. I can't wate to ride the chopper because I fabed most of the bike in my garage with a welder, a set of tourches, a pipe bender, a laser, and the ***** to do it because some one said you can't build **** like that with out a full blown shop. thanks agian boss!

 

Got any way of postin' some build pics on here?

 

I think the woman is getting me a digital camera for x-mass. When I get it I'll find a way to set up the picks. I haven't seen all the options in the forum yet, but I will.