I see where you are comin from. I have just bought a super clean 85 swb. I plan on putting a 350 in with vortec heads, but I am tempted to rebuild the 305. Why? you all ask. So when I smoke people I can say I did it with a 305. Plus there would be a big fat ITOLD YOU SO to everybody who says that 305's aren't fast. So far I don't think that anyone has really addressed your question. They haven't said anything that has made me want to cross that line anyway.