If you have a 1.5 swr your antenna isn't resonant

Tnom, Frank, smack his pee pee until he understands that 1:1 and resonance
are related but different. You can have one without the other.

Tell you what, put a 102 inch stainless steel whip on the roof of your clunker.
Use a 4 inch heavy duty spring. Use enough coax to reach the radio. Measure SWR.

Tell us what you get. Respond before December 31st.