Configuring the dataformat properties doesn't change the marshal behavior.
As an example with following configuration:
connector.class=org.apache.camel.kafkaconnector.http.CamelHttpSinkConnector
{{ tasks.max=1}}
{{ topics=cf7e42f5f38a43ceb51c2c481955e1cd}}
{{ camel.dataformat.base64.lineLength=10}}
{{ name=CamelHttpSinkConnector}}
{{ camel.sink.marshal=base64}}
{{ camel.sink.url=http://localhost:49282/body}}
{{ value.converter=org.apache.kafka.connect.storage.StringConverter}}
{{ key.converter=org.apache.kafka.connect.storage.StringConverter}}
The resulting strings are still split 76 characters apart, same goes for lineSeparator and options in other dataformats such as maxDecompressedSize in tarfile