I am looking at a set of heads and the flow numbers are as follows. Let me know what you think. Thanks.

Lift Int Ex

.100" 64 53
.200" 135 110
.300" 195 155
.400" 238 192
.500" 260 215
.550" 263 225
.600" 265 232

 

I'd say they look real good. The intake number(although very good)could be a little higher...don't know if those are with stock valves or not, but they could be in the upper 270's to 280's. The exhaust side looks good. Depending on price, you might be able to get yours ported for less. I guess if I had the money I would just buy a set. I would look into a cam maybe before you get them ported. Don't know how large you would want, if any, but like a cc305 or 306, hotcam or 224/230 would be a nice addition with the heads...IMO.

 

Runner size?
Stock Lt1 casting?

 

were they flowed with a pipe.

 

exhaust side seems high... I am guessing port extensions?

Of course this assumes a stock casting....

 

I agree. The exhaust side seems pretty high.

 

Looks like they were flowed with a pipe on the exhaust. How may inches of h20 were they flowed and what was the bore size?

 

The intake side is slightly worse than my stock LT-4 heads flowed but the exhaust is a bit better. what are those??