I have a 327 that has been boared .60 over and a weind stealth intake manifold and World Product heads I think that they are 76CC heads they are the touqer heads. with a edelbrock 600 made in to a 625. I was told that I should port out the heads a bit this winter so I will get a better flow. I s there a certain size that I should ask for or do they just smooth everything down or what. I am not real sure exactly what he meant by that.

Thanks for any input on the situation

 

Does that mean you'll be getting someone else to do the porting?

remove a valve cover and get all the numbers off the head.
(determine chamber volume)
You can red about whats involved in porting a set of cylinder heads here...
https://www.thirdgen.org/forums/tech...-pictures.html

 

The ports and chambers are rough cast with only minimal machining - basically no more than it takes to get the valves in. This leaves relatively poor flow paths and sharp changes in shape. The Worlds are as bad or worse than stock heads for this.

When porting, you aren't really looking at changing the size of the ports, but rather smoothing and rounding the flow paths. Two things you can/should do to educate yourself on this: 1) Go to the tech articles linked from the thirdgen.org homepage, and look for the porting article, and/or search porting on the techboards; and 2) Google Standard Abrasives and look for their Do-It-Yourself Porting guide - an excellent resource with good photos and descriptions of what to do. The most important areas to work are the valve "bowl" or "pockets", and the short side radii. The only thing I'd add to the SA guidelines is to get a couple of carbide burrs to go along with their sanding drums and buffs (you can actually do a decent job of porting with just the burrs). More people are going with electric die grinders as well - a lot handier and cheaper than getting a good enough air compressor to handle the flow requirements.

About your heads specifically - I wouldn't bother. Those huge 76cc chambers are killing your relatively small displacement engine. Get a set of their smaller chamber heads (even the 305 units), port/clean them up, install them then sell your current heads to recoup part of the cost.

If you decide to pay someone to do the porting work rather than do it yourself, have them do a "pocket port" or "bowl work" job. That's where you'll get the best bang for your buck. Polishing should only be done to the chambers and exhaust ports, if done at all.

 

Thanks that help a lot