My SJ, A code, no AC or power assists has had some changes to the timing cover, water pump and thermostat housing over the years. One of the problems this has caused is getting a bi-pass house to fit. Pictured is the correct bi-pass hose ? The thermostat housing has a ' thinner ' nipple ' and the hose fits much better. I have not seen this style housing before. It is aftermarket but is the ' flat top ' no fitting style correct ? Hope that makes sense ? Thanks, Brian