Question about the front Coil Springs!

[67chevrolet]

Hey there!

Question about front suspension.
Originally my truck had a line six, but i wanted a V8 so that's what i did.
I built one into my truck.
But now my front wheels look like this / \ because the V8 is more heavy than the line 6.
Does it help when i install heavy duty front coil springs?
If it does, are there heavy duty front springs that lower my truck but
keep my wheels straid?
The reason i ask you this is because i like the front lowerd but i wanna
keep the wheels straid. Are there any other options?
I tought about spindels, but i live in the Netherlands (europe) and shipping is realy expensieve, so that isn't much of an option i think.
Any idea's?????