Just curious, When I cruise on the highway my galaxie turns 4000 at 70mph..This is a bone stock 352 no mods what so ever.
How long at that sustained rpm before damage might occur  in idea conditions, good oil pressure normal operating temps ? The motor runs perfect no issues and has about 9000 miles on it. How long would you feel comfortable driving at that rpm for a cross country trip? The car / engine is meticulously maintained

VERY NICE JOB. I LOVE TO SEE THE 66 GETTING SO MUCH ATTENTION NOW WITH AFTER MARKET PARTS. MY FIRST TRUCK WAS A 66 F100 CUSTOM CAB. I WAS 14 GOING ON 15 WHEN WE BOUGHT IT. THERE WERE NO FLOOR PANS THE SEAT WAS BOLTED TO A 2X4 BOLTED TO THE FRAME, BRAKES DIDN'T WORK , AND THE TRUCK WAS BEATEN UP PRETTY BAD. THE DRIVER DOOR HAD BEEN PEPPERED BY BIRD SHOT AT ONE TIME AND THE GUY USED TO GET FIREWOOD AND HAD ALL KINDS OF DENTS AND CREASES IN THE BODY. IN THE LATE 80'S MY ONLY OPTIONS WERE JUNK YARDS AND HOPEFULLY FINDING A VENDOR IN THE HEMMINGS BOOK. ANY WAY IT WAS PAINTED RANGOON RED AND WHITE SIMILAR TO YOURS. I DID THE BODY WORK AND MECAHNICAL WORK TO IT OVER A FEW SUMMERS AND DROVE IT IN PRIMER TO SCHOOL. I STILL HAVE THE TRUCK AND DRIVE IT WHEN I CAN. ONE DAY I HOPE TO RE-DO THE BODY AND PAINT THE WAY YOU HAVE. YOU HAVE A DONE AN EXCELLENT JOB AND GIVES SOME HOPE THAT I MIGHT GET TO FINISH MY 66 ONE DAY. LOOKS GOOD KEEP UP THE GOOD WORK.