Use the mds delete plugs, they work fine,
put them on a rebuilt 5.7 long block for my 05 Ram,
prime the engine before starting, check oil pressure!

86 Daytona - 612/ glide - 2400lbs - 8.60 alot more left
71 S/G Challenger - 469/glide - 2800lbs - 9.20s and tuning
70 Challenger - mild 440/727 - 3475lbs - 10.96 best
70 GTX - future quick 16? more $$$$$$