For information on V6 conversions see Bill Guzman's web site.
http://www.classicconversionseng.com/
After seeing what is involved and the total cost of good conversion you may find it's best to repair the blown head gasket. It takes most people doing engine conversions a year + to get their car going again. I've seen some cobbled up conversions with a hole cut in the bonnet to provide room for the carb and air cleaner. If you have a good shop and can do quality welding and have lots of fabrication experience you can do it. However, if you have to farm out the work at $50-$75/hour the costs can get out of hand. After you are finished you will have a modified MGB whick will be hard to sell at a fair price. At the present there isn't a big demand for modified MG's. If you had a 32 Ford Coupe my advice would be go ahead but use a Chevy small block engine. My 2 cents, Clifton Gordon
