Naaaa Spark plug removal is not a problem on the 460. You do have to remove the driver’s side rocker cover to easily get to the two rear plugs, but that is not a big deal.
The 460 is by far the $/HP or HP/LB leader. Check the numbers..
Engine.....351.......351.......392.......460...... .460.......514
HP...........385.......360.......430.......500.... ...550.......625
Car Wt.....2500.....2500.....2500.....2625.....2625... ..2625
FRPP #.....d351r....e351r....d392....g460.....f460..... .d514
Price.........5495.....5495.....6500.....5795..... 5895....7595
$/HP.........14.27.....15.26....15.12....11.59....10 .72...12.15
HP/LB........0.15.......0.14......0.17......0.19..... .0.21.....0.24
Craig