Front springs 6cyl. vs. 8 cyl. type

[littlebubba]

I have an 81 2WD that originally came with a straight 6 in it I was told, and still has the original front springs. I know at one point GM used different springs on 6 cyl. vehicles vs. the 8's. The 6's were "weaker" pound wise than the V8's. If I install a V8 with these "6 cyl." front springs; how much lower can I except it to sit compared to V8 with V8 front springs? What about ride quality? I wouldn't mind if the front sat alittle lower, as long as the ride isn't too bad.