New to the 4.9l

[Accordability]

Hellllllllllllllllllllllllllllllllllllllllllllllll looooooooooooo Caddy lovers,
i just was blessed with the opportunity to become the winning bidders on a '92 Eldorado with 110,000 miles on 4.9l motor. untill now i've pretty much been a rice burner(riced-up honda's mostly) and with my new found maturity(plus the fact that travel on the highway often, about 6,000 mi/month) i have a need for additional leg room(and any other room available) i was opting for a de'ville. that's when i happened upon a auction for the L-Dawg.

so now that the sale is 90% completed, i decided to come to the pros. though i enjoy the comfort of the caddy i still have a need for additional hp & proformance gains. that's leads to my question, what are the first recommended steps to "sensable"(meaning not to break the bank) upgrades for the 4.9 motor? also, where can i find what i need?

thank you in advance,
dave