61unibodyhotrod

I have a 61 unibody truck that I have put an 88 HO motor in it. I bought the motor without the fuel injection and such. I am wanting to carb it but I am having a problem getting the right intake gaskets to seal it up. Couple times I tried with typical gaskets, it leaked water. Anyone been through this before and what did you do/use. Thanks for reading if this has been asked before I apologize.