You have to start out with a 350 Chevy engine for bolt main ,boarded over 30 change the crank case Pistons and rods if done correctly you should have 600 hp not 420
replace cat
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Csytalc converter. i think bank 1 , drivers side. get a new one
4203 = 420 x 420 x 420 = 74088000
21% of 420= 21% * 420= 0.21 * 420= 88.2
95% of 420 = 399 = 95% * 420 = 95%/100% * 420 = 0.95 * 420 = 399
88% of 420= 88% * 420= 0.88 * 420= 369.6
38% of 420= 38% * 420= 0.38 * 420= 159.6
35% of 420 = 35% * 420 = 0.35 * 420 = 147
420
95% of 420 = 95% * 420 = 0.95 * 420 = 399
500% of 420= 500% * 420= 5 * 420= 2,100