thank you it is indeed the L series. I do have a 22r in it right now and just recently started looking into the 20r head on it and i think that is the plan. but i want to get a strong transmission that will bolt up and when i pull my motor and tranny out i can just swap right in. if i have to modify a little to get the best tranny i will but im not sure what the BEST transmission is. Isn't the R150 i think? supposed to be one of the best? will it bolt to a 22r block without an adapter?