Exhaust manifold gaskets (using LA manifolds)

I am using '67 era 273 exhaust manifolds on my '94 Magnum. I used Magnum gaskets and they lasted about a year before blowing out. I know that there is a port mismatch between Magnum heads and LA manifolds.

My question- What gaskets should I use? Magnum or LA or something for headers? I am planning on using Remflex gaskets.

Remflex Exhaust Header Gasket Sets 6004 Magnum gaskets
Remflex Exhaust Header Gasket Sets 6027 Pre-Magnum
Remflex Exhaust Header Gasket Sets 6003 Headers
Remflex Exhaust Header Gasket Sets 6016 LA with 5-bolt valve covers

Thanks.