The edelbrock intake manifold should fit just fine, and I believe Weiand has a couple as well. Just beware, there are a couple "Race only" manifolds that do not have the front water crossover build into it. A quick check for the thermostat housing would let you know if it's ok or not.
I suggest not going too big on the carb either. I wouldn't go any bigger than 600cfm on the Rover.
My oil line fix
My 100k stopped odometer fix
Brace for impact, I'm in a "modifying mood". Massive thread count inbound.