Carl,However, when I raised the rear of the tranny I had to trim about 1/2" off the top of the toe board. However, when I put the tranny cover back on you couldn't see where I trimmed it.
Ditto on that,I'm running an HEI distributor and did not require to change/alter/dimple the firewall in any way other than the slight trimming above the bell housing Alvin mentioned.
With the trans cover back on you'd be hard pushed to tell there were any modifications at all.