for all it is worth, here is my take on the fiberglass inner fenders. I installed them on my 70 cst10 with no trouble, but the problem was I washed the engine, got the distributer cap wet, was in a hurry, climbed up to get to the cap and yep, you guessed it, cracked the ---- out of the thing. so, i went back behind the shop and pulled the old ones out of the pile!