If you still go with a remote solenoid for converting chevy starters, I'm pretty sure NAPA and other parts stores sell them. You might save the Jegs handling fee, if not get a better price.
Mad Electrical has an online description of remote solenoids for chevys. Mad also sells a book on automotive electronics for do-it-youselfers. I've heard rave reviews of this book. Tells how to do remote solenoids, headlight relay "brighteners," alternator upgrades, and more. If you go thru Mad for the solenoid, you'll get the book either free or cheap.