I run L26 with L67 heads and GenV on top. Just check the surfaces, and redo proper gaskets on the top half, and you should be golden. The L26 makes a real nice difference over the L32 or L67 bottom end...so enjoy that. Welcome to the 3800 family...
I'd run an l67 or l32 over an l26 any day. Not sure what is so special about an l26... Just a cheaper solution when replacing a 3800.
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01 Silvermist GTP - E85 - Cam - Heads - Phenolic IC - Polished Gen V - Stock trans...