just did h/c/i swap on my 94 with trickflow 170 heads and track heat intake i bought a set of trickflow tall covers to clear the stud mount rockers but my egr valve is now hiting the cover i put a one inch spacer on the upper manifold and it still hits the stock covers are to short what valve covers should i try to use if i buy aftermarket "stock height" covers will they clear are they a little taller i heard the 92-93 covers are cast and are a little taller is this true any info would help thank u