Trucks were roundish in the 50s, squared in the 70s, roundy again in the 90s, now getting squared and angular again. Heck, nowadays trucks aren't even trucks anymore, kindof a cross between truck and SUV and station wagon (remember those?).
Matthew 6:33
1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com