You will find that the studs on a mini stater solenoid are really close to the block on a big block engine, so this information will show you everything you need to know and where to buy all the parts needed to alleviate the problem. Vitamin C did the initial post and I looked up the source for the parts, but it's now available to all for free.
mini starter solenoid stud relocation
Tom
mini starter solenoid stud relocation
Tom