I have an 87 240 with 134a in it.I would like to add a fill port to the top hose that crosses over the engine.I believe this is the low side.I went to a place that can make hoses with the compressed fittings.He said to bring mine in and he would do the conversion.But this hose is a pain the neck to remove and he doeen't have small portable crimper.So can i add this fill port and just connect it in line with hose clamps?It is the low side so I think it would be ok pressure wise,yes?Your thoughts on this.I have seen a few cars with this conversion/adaptation.
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