Got mine (26 inch) from Radiator US on E-Bay, direct bolt in absolutely no modifications were needed. Living in Southern California we see temps at 100 degrees or more and have not had any issues after I upgraded the cooling system with high flow water pump and new heater core- old one was rotting out and would plug up cores in radiator with rust!
Don’t have exact HP for the 440 I was running, but specs were:
· 10.25:1 Compression with new KB HP Pistons.
· Heads are Edelbrock RPM Performer Aluminum, Intake 2.14 Exhaust 1.81
· XE274H Cam, Lift: intake .488, Ex .491, Duration 230/236
· 2400 Stall with Trans Go Stage 2 shift kit
· Quick Fuel 830 cfm Double Pumper w/mechanical secondaries
· Performer manifold Aluminum Radiator, Aluminum High Flow Water Pump
· Dual electric cooling fans
· Ceramic Coated Headers to dual exhaust 2 1/2 pipes to 40 Series Flowmasters
· Rear end 3.23 "Strange Engineering" Posi
I am nearly done with the new motor, 500 Stroker! I hoping that will also stay cool!
Good Luck.