I broke my last hyd f.t. cam engine in with only the outer valve springs. It's a 541/529 /292. After break in I added the inner damper springs. Knock on wood. Been going good and has over 55,000 miles on it so far with no issues ever.
1963 Belvedere 440 Max Wedge Tribute
1970 Charger R/T S.E. 440 Six Pack
1970 Challenger R/T, 528 Hemi
1970 Charger 500 S.E. 440 4 BBL
1970 Plymouth Road Runner 383
1974 Chrysler New Yorker 440
1996 2500 RAM 488 V-10 4X4
2004 3500 Dually Cummins 4x4
2012 Challenger R/T Classic.
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