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I am thinking your 361 is going to be running about as hard as an engine can run already. I doubt it can pull much higher speeds.
Before you start spending a lot of time and $$$ making changes, invest in a manifold vacuum guage.
The maifold vacuum will tell you how hard your engine is working. If you are pulling less than 10" of manifold vacuum at full speed cruise, it is unlikely you will be able to go much faster, regardless of what rear end ratio you use. If you are running less than 5" of manifold vacuum at cruise you definitely will not be able to go any faster.
Good luck and happy trails.
Mark O. |
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