I got 4 engines with Hughes Flat tappet cams....one hydraulic flat tappet in a street car....couple more in spare short blocks...

Have broken them in with the dual springs......

never had any flat lobes.....


Tony

70 AARCuda Vitamin C
71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield)
71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas)
71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)