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Discussion Starter #1
FYI-IF ANYONES INTERESTED-IT WORKS GREAT

Runs 185-190 all day long in any weather using:
-GM serp belt system
-GM 9 blade fan(20 inch-fits in 71-72 shroud only)
-GM or after market hd/sd clutch can be used

Only negative:When that 9 blade fan and clutch kick in WOW that is a lot of loud air being pulled in. Nice thing though it is it runs so much cooler that fan hardly ever kicks in.
Major positive: all GM and looks likE it came that way

Marc S
 

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FYI-IF ANYONES INTERESTED-IT WORKS GREAT

Runs 185-190 all day long in any weather using:
-GM serp belt system
-GM 9 blade fan(20 inch-fits in 71-72 shroud only)
-GM or after market hd/sd clutch can be used

Only negative:When that 9 blade fan and clutch kick in WOW that is a lot of loud air being pulled in. Nice thing though it is it runs so much cooler that fan hardly ever kicks in.
Major positive: all GM and looks likE it came that way

Marc S
Pn's for this combo?
 

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Discussion Starter #3
Pn's for this combo?
1EA-BLADE, ENGINE COOLING,(20 INCH/9 BLADE)-GM#15021599 $285.70
4EA-STUD, ENGINE AIR COOL FAN, 12338107 $4.20
4EA-NUT-GM#11514602 $0.76
1EA-CLUTCH, COOLING FAN THERMAL(H/DUTY)-GM#19150654 $206.99
1EA-BBC Serpentine Accessory Belt Drive System Deluxe "Less Air"- GM#19172806 $686.99 (I have only seen this kit available through pace performance.com but I walked in to my local Chevy dealer and was able to order and buy it)

You can save quite a bit on the clutch by getting a Hayden part # 2784(severe duty) as its $69.99 at Oreily auto parts.

Notes:
Depending on motor mount/fan shroud usage you may have to "shave" your stock non 71-72 fan shroud a little as its a 20" fan.
Depending on whether you have power or manual steering you may have to slighty clearance the bottom of the P/S pump body to clear your box as this system places it farther forward that that of a 68-72 V belt system. You will also have to swap the hose connections from your 68-72 pump.
Depending on year of heads you use you may have to buy a couple of bolts with "normal" threads as kit comes with a mix metric and standard bolts.
 

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Discussion Starter #5 (Edited)
UPDATE--- 71-72 BB serp belt 9 blade fan and clutch upgrade

Rad and heater hoses have since been replaced with GM repro's.

Marc S
 

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