Geezus $600?? Bring it down to SC and I'll help you put it in for $250. I hate to tell you but with the exception of the Exedy OEM Replacement Clutch Kit (Part number FMK1026) you're not going to get very close to the $400 mark. Even that kit is $440.
Here's a link.
https://shop.exedyusa.com/exedy-oem/exedy-oem-replacement-clutch-kit/fmk1026/i-2295572.aspx
$600 is very average for a clutch install....
usually 7 hours labor
And We've put in both just about every Mcleod clutch there is, and havent had one single issue or complaint.