400 stroker or 440

i built a 451 stroker,about 12 years ago,a 400 block,040 over,ross pistons,stock 440 rods ,440 steel crank,mains turned to fit 400 block,stock 915 heads,ported myself and oversize valves,850 holley,528 comp cam,on gas in a 68 cuda,with 456 gears,ran 10.60s,on alky ran 10.40s,never hurt anything,what does that tells ya,the 400 has a better rod rato too