Are you asking for specific size/part# combination recommendations, or for general feedback re: hydraulic vs solid?

If specific size, I'd say there is a boat-load of info that needs to be shared before anyone can really comment: intended RPM range, drivetrain combo (if auto, what stall on the converter), what rear-end gearing and what tire size, vehicle weight, intake (single or dual) and exhaust setup (header sizing), engine CR, intended fuel use (you said street, so 87 or are you willing to cough up the cost of "arm&leg" to run premium - 93/94?), etc.