Yes, there were many issues with casting/porosity . However I would never bash Jim or any of his efforts. He was doing what no one else would at the time and made many different configurations as well. Many of his heads and blocks ended up in record setting race cars of all kinds. Roundy round, road race, drag race. His parts had a lot of potential back in that era. If it wasn't for Dove and all that they done I doubt very seriously that the FE would be as far along as it is now. As far as the Canadian cobra jet heads go, it took me 14 months to get a set. Neither had any leaking issues although they looked completely different from each other. One was the typical looking aluminum casting we are familiar with these days and the other was a very dark gray and rough looking. My ccj heads after fitting the valves 2.09 and 1.65 and a nice valve job went 306 at .700 out of the box with no port work. However the valve job was done by Bob Evens who did heads for grand national engines back in the 80's. He later did port work for me, fitted 2.15 and 1.65 11/32" stem valves for my 4.130 bore FE. The heads worked really well and went 332 at .700 after that. Those heads are still going strong on a 68 torino fast back street strip car that goes 10.20's is full street trim. Kinda wish I woulda never sold them.
