i have a 496 rb with iron -1 heads.9-1 comp.would it be worth while to have these fully ported for the street?its not really a daily driver but when i do drive it i like to drive it all day and it does see the strip when ever i can make it.

Bowl port,blend and gasket match is your best money spent.Leave as much support at the valve guide as possible. No need for full porting.

That is pretty mild (9:1) compression even at those cubes so your return in terms of HP/$ spent is going to be a good bit lower than if your cr was 1.5-2 points higher. As the Big Guy (BG) said along with a good VJ (which can help speed flow without adding CC's to the port) would be your best bet. The -1 works very well and has plenty of flow and cross section up top, so your best bet is trying to bring the 'Sweet spot' in a little sooner and hang on to it a little longer, with the right bowl, port match and Valve job you can get bot....without really any downside....and without the $$$ of a full blown port job.

The work described will help it act like it's got a little more aggressive ramp in the cam and if it's done right it should make it noticeably snappier throughout the powerband.

I agree with the others here that the as cast -1's have plenty of CS for what you're doing and a high quality competition valve job and some transition bowl blending would show the best results.

VJ and chamber work!

when i get ready to freshen this motor i was thinking of going up a point or 2 in comp.do you think that would utilize these heads better?i wish i could remember what cam i have,its got a pretty loose 10 in conv. in it.i really dont think my entire combo is right on, so ill be looking at every thing. its a 69 b-body,4,129 lbs,best of 7.50 in the 1/8.this motor just seems sluggish,no snap.