This is a Dayco # 5060445. I think 44.5" long. I ran this with the set-up you are talking about. Should also work with UD pullies.
Keep in mind the WP should be a clockwise spinning pump. Your 88 will be counter-clockwise. Unless you have the idler pulley on the dr. side of the motor, then dis-regard all info.
My set-up is three pullies and alt. idler arm. The tensioner is very close to it's limits, but it works fine.
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82 Mercury Capri 302.
Comp. Cams
Tremec 3550
3.73's
12.8@106 N/A
Kevin's Capri
[This message has been edited by shovelnose (edited 04-24-2001).]