Guys,
Thanks for the replies.
The original question states that I already owned the engines. Please give opinions along that context. Thanks.
Sorry Guy if you did not get my drift.
John Simpson uses the AT 36 exclusively and has won the Nats as well as other contest with that engine.
I personally have no experience with it other then seeing them in action.
If you have both and not worried about price then try them both and you tell us.
Again IMHO it is like comparing a Chevy to a Toyota. Chevy's are cheap and dependable. Toyota the same but cost a little more but you get more mileage out of a Toyota. (Your mileage might vary)
I have yet to wear out a LA engine so that again may tell you what I know.
If Money was not concern I would buy a AT.
Because you have both can you weigh them and provide the results?