I have my eye on the Terra Low 4 to 1. I think I can have SD put in cheaper than $4000. I haven't really sat down & priced it but I'm in no hurry. I'm still getting used to & having fun with my curret axles. Plus, the '00 is notorious for having bad head issues. Easy fix is to swap in a older head. Just make sure that it is not already cracked & ruined the main bearings.