Thanks to all who responded to my 1/28 post about needing advice related to a suspected blown headgasket in my '73. I took the head to a machine shop and found out late lasy Friday that it has a hole in it. I won't know if it can be welded till Monday. That brings me to my big question. If my E88 head can't or shouldn't be welded, I will need a new head. I have a complete '77 Z engine I bought from a guy doing a chevy conversion a couple of years ago, it's never been apart. What types of problems will I run into if I use that N47 head on my 240 block. I'm running twin weber DGV's and the Motorsport Auto 3 into 2 header. I know that the intake ports on the head will be round with the little notches cut for the fuel injection and I believe that the N47 has the sleeves in the exhaust passages. Are these things problems? what about performance or anything else? thanks.