[HayZee518]

your use of the split bolt splice with the metal bar is correct. the split bolt connector should be marked Cu-Al if it is approved for aluminum/copper splicing. No 6 copper carries 65 amps. your use of #6 aluminum is a mis-nomer. for your aluminum wire to carry 65 amps it would need to be a #4 cable. normally aluminum goes one size higher for a given amps. #6 al is equivelant to #8 copper or 40 amps. #12 aluminum carries 15 amps. #10 al carries 20 amps etc.
As far as splicing the way you dis, first go with five layers of rubber splicing compound then four layers of friction tape and finally two layers of plastic electrical tape. Use the anti-oxidant on both conductors not just the aluminum.