Hi,
I think this should help you out.
def utils = new com.eviware.soapui.support.GroovyUtils( context );
def project = testRunner.testCase.testSuite.project ;
def tc = project.testSuites["TestSuiteName"].testCases["TestCaseName"]
def httpRequestHeaders = tc.testSteps["TestStepName"].testRequest.requestHeaders; //captures the request Header value
def httpRequestContent = tc.testSteps["TestStepName"].testRequest.requestContent; //captures the request Content value
log.info httpRequestHeaders
log.info httpRequestContent
Regards.