How do I tell if I have square or round ports?

[Dirk Diggler]

Honestly I didnt do any research yet, someone will probably be able to tell me before I am able to find it on the net. Im having a friend build me a header, but I need to know if my engine has square or round ports, its is an l24 in a 70 240z. Are there any numbers on the block or head that would tell me? I need to know within an hour because tonight is the only time he will have to work on it for the next month or so. Thanks for putting up with my lazyness!

[blue72]

http://datsunzgarage.com/heads/index.htm

 

http://www.bandmzcars.com/headinfopage.html

 

http://zhome.com/ZCMnL/tech/head.htm

 

Though I usually find that internet forums aren't the greatest places to ask for time sensitive information.

[503Alex]

The head number will be between the 5th and 6th spark plugs (right side of the head).

[Dirk Diggler]

Looks like I have round ports, thanks guys

 

 

[nismo dr]

if the ports are round - they are round ports. If they are square they are square ports.

 

[nismo dr]

badum tish

 

I'll be here all week

[Dirk Diggler]

haha I figured that much, but I still have the stock mani on there and didnt have time to pull it off to look