Olds 455 runs hot - dyno 210hp rear wheel

[richnee]

Guys,

I have several issues with my rebuilt 455 olds engine: 1st) the car runs hot. I have added 165F thermostat, new 4 core radiator, removed the ac unit to allow air flow and the fan is a std 6 blade thermostatic controlled clutch fan which did make it better , however it still runs hot over time. The last thing I can think of is to add a fan shroud. What else can I do? 2nd) I did a dyno - the rear wheel hp 210 with 300 ftlbs. torque - I'm lost......Could my cam be improperly positioned?

Here’s my build:
Block: 1974 Olds 455
Machining: Bored over .060 = 468 cubic in, Block is Square and Align Bored
Pistons: Probe SRS 2618-16 Aluminum Forged Part #14476-060 10:1 ratio
Stroke 4.250, C/H 1.735, Bore 4.185, Weight 564/578g
Heads: 1968 Iron heads - 403686E 80cc 2.000, 1.625″ Milled: .005 /.010”
Cam: Isky Cat #691271 Grind Style -270-MEGA HYDRAULIC
Specs: RPM: 2000-6000, Lift: .496, Dur: 270° Dur: 221°, Lobe:108°
Timing Chain: Cloyes
Intake Manifold: Performer Edelbrock Aluminum 2151
Carburetor: 1402010VE - 750 cfm Speed Demon - Electric choke w/Vacuum
Exhaust Manifold: Thornton Reproduction 1965-1967 w/functioning damper.
Modello: Windage Tray-WT-200 & Valley Tray – VT-581
Waterpump: Alum AP403
Pulleys: Alum
Rear End: chevy 10 bolt 3:42 posi
Trans: 350 Auto 3 speed w/shift kit
Radiator: 4 core
Fan: 6 Blade thermostatically controlled clutch fan.
Air Cleaner: Forced Air Induction

Your thoughts would greatly be appreciated,
Rich