4X heads are to prone to cracking. The 6X-4s, even in their stock 92cc form, will raise your C/R to a decent level(9.3:1). I would use the 041 cam or an 041 clone with Rhodes lifters and the 1.65:1 rockers.
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“It takes considerable knowledge just to realize the extent of your own ignorance.”
Dr. Thomas Sowell
Last edited by hurryinhoosier62; 07-31-2019 at 12:14 PM.
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