the V8 springs are MUCH stiffer... the difference in weight from a I6 to a V8 is quite a bit... when I swapped motors my nose dropped about 3" over having the 6er in it... a buddy of mine has a fact. V8 gremlin and his is higher than mine ever thought about being...and I don't care for the ride either...that is a V8 car w/ A/C PS PB twin-grip torq-links and pop- out glass... the less options the car has...the softer the spring...so a man. 232 base grem will have the softest... the rate is determined by coil dia., # of coils, and the coil spacing...