K frame lowering blocks

i moved my k member down on my 67 barracuda. had the engine out and wanted extra clearance for dizzy and air cleaner
already have offset lower base air cleaner . when i took the bolts down the side near the steering box only dropped enough to put 3 1/8 washers in . this is what i ended up with 3/8 lower. no noticeable change . would of liked more but didn't want to introduce any binding .