If i can scrape up enough cash to buy a LS1 with trans i could sell you my spare 87 Monte SS CZF code 200-4r that i have. It may need a rebuild though. I got quoted 800.00 for a High performance rebuild along with some upgrades. It shifts kind of hard so it may be a shift kit?.... But in your car with a 383 i would definetely consider a rebuild. I am looking for a decent priced combo and then i will start the swap on my 85, But i have had just as much of a hard time finding something :| OH and by the way my ex was the same.......