These thermostat housings will fix your leak with a gasket seal design. This design works with a Mopar thermostat only. Late model Chrysler style thermostats suggested. Neck goes straight up, must use Mopar thermostat.
Chrome Water Neck Fits Oldsmobile 330 350 455 Olds Engines
Chrome Water Neck Fits SB Ford 289 302 351 W Engines Comes With Bolts & Gasket
Chrome Water Neck Fits Ford FE 352 360 390 427 428 Comes With Bolts & Gasket
Mr Gasket 9713 Chrome Water Neck Fits 79-97 Ford 5.0L / 5.8L 302 / 351W V8
Chrome 351 Cleveland Water Neck Fits Ford 351 Cleveland Engines 351C
SBC BBC Chevy 15deg CHROME WATER NECK THERMOSTAT HOUSING WITH TEMP PORT #9468
