I ordered big block springs from Eaton...1" taller than stock...1970 Nova with L78 and TH400. we wanted the old school day 2 drag look...I think the look is perfect. We have 15 x 6 wheels on the front with 215/75r15 tires/235's on the rear. I don't think you want to go higher than that...steering will be compromised.
ps...they were a bear to install...that spring compressor was like a hand grenade...I'm glad it didn't go off [img]<<GRAEMLIN_URL>>/drool.gif[/img]