360 in a 75 Roadrunner

More rear gear or more torque are your choices for any reasonable change.
You can get more torque with another converter.
This lets the engine get into it's best RPM range for producing torque on takeoff.

Displacement is another solution, but obviously this takes a lot more money, a bigger motor or both.

I would have to say the biggest change for the least amount of cash is going to be rear gears and the converter would be next.
I have been on the B bodies only sight for years and have pictures posted there. I have read multiple times for the best advice for a small block is here so I joined. Thanks for the advice on the gearing. So what type of TC would you go with or what stall speed? Thanks again