Quote:
Originally Posted by Mark Yacavone
Bill,
What other engines are they approved for? Do you have a picture? Approx cost?
Thanks
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Mark,
I have direct knowledge that they are approved for Pontiac and Olds engines. If you like I can take a picture but it looks exactly the same as the BBC modification. Clark only has the one insert to my knowledge. The first time I talked to Clark he said to send him a set of the rockers I wanted modified and he would let me know if he could fit his insert in. They fit, he welded them in and I have not broken a rocker since. I couldn’t go 12 passes without breaking one. And for Mike; that’s in a motor with only 364 lift at the valve and 150# seat pressure.
And for those who are not using them and would like to but don’t know if they are approved I would suggest you do exactly what I did; I asked my division Tech Director if I was allowed to modify my rocker arms like the ones approved for BBC’s . Dave wrote back to me saying he was unsure and asked me not to run them until he consulted Glendora. Few days later he wrote back saying Bruce said they are approved.
Cost was around $250 to have Clark do rockers I supplied.