....Get yourself a "Summit" cat. scogging dickey cat. and a PAW cat.
Most places are chevy dominated but you'll find lot's of good stuff there too. Yeah, Jegs is a good source too.
If you're looking for rebuild kits the PAW cat. is a good reference guide. At PAW FE stuff is still going strong. But you should be aware of their sometimes less than excellent quality on engine parts and kits.
There are a few other forum mates that run FE parts business. There are many other sources just SFTFN.