Yeah sorry. There is more work involved than just bolting it on. I don't believe you have to bore the hole out but either shorten the L36 stove pipe or use a L26 stove pipe. An adapter plate for the TB will needed. Also some work on the UIM to account for the PCV and IAT on the L26 UIM.

If you like doing the work and wanna do it here it is:

BonnevillePRO.com • View topic - L26 aluminum UIM on L36--Done! With results!!