430 ci

Mostly depends on what your planning to use it for, rules allow etc. light is generally good for mid to low HP. Too much power/rpm they may grenade prematurely. I run a pure stock and I'm restricted to stock heads/exhaust manifold/ and only 1gm performance intake, basically stock replacement. I cant really use very light stuff to its full potential.And for me I have a good setup for longevity and weight. The more power you plan to make the more strength you may need(I.e. weight) keep in mind that light can work in higher HP but the tolerance during building must be closer to perfect unless that money is usually wasted. And re-building more frequent

ive always run the heavier assemblies and had good luck with them , i remember when nascar was using qualifying engines and i was told there crankshafts were widdled down to nothing , thats why they ran so good then BOOM after there last lap, so i learned back then that lighter might hav been faster but the heavier was the way to go for endurance, so i still go with the heavier in my engines , but everybody is going lighter seems like these days so i guess they got more money or less sense then i do, lol . anyway , im running a street stock class that is probably the most fun class ive ran, a little expensive somtime but fun, OUR RULES, ANY CUBIC INCH , NO ALUMINUM HEADS OR BLOCK, NO QUICK CHANGE REARS, ANY TRANSMISSION NO DIRECT DRIVE. ANY CARB NO DOMINATORS, GAS ONLY, END OF RACE MUST BE 3200 LB , OH AND ANY TIRE 10 INCH WHEEL OR LESS . now 2 yrs ago i ran purestock and it was a really good class, shouldv been called street stok ,i ran a 415 last yr it was ok till i scatterd the motor not 1 time but 3 luckily the guy that built it stood behind it BUT IT STILL COST ME DOWN TIME AND A FEW CUSS WORDS. OK GUYS THANX I WAS JUST TRN TO FIG OUT WHAT TO DO THISS YEAR ALL HELP APPRECIATED , THAXMJ AGAIN

i usually turn between 68 and 7200 rpm

i might just try the lighter stuff then