Building a 74 Duster with a big block 451 stroker. Going to use the Schumacher conversion spool mount kit. I have a Melling High volume oil pump to use. Anyone know if there's any interference problem with the crossmember mount area using this pump? Or is it no problem?

Put a 383 in a 74 Scamp and the oil pump was not a problem.

I don't think the physical dimensions of the Melling HV pump are much different than the stock BB pump.

I don't have experience with the spool mounts personally, but as long as the height of the motor is the same as the stock mounts, the oil filter should be above the k-member.

I used the lager high volume high pressure pump which is longer than stock.

Remember the direct connection kit that was the taller rotor, a spacer plate, and couple gaskets....to piece together your own HV pump from a stocker? The kit wasn’t that much cheaper than a whole new HV pump.

i believe the difference is 1/4".

Looking at it, it's going to be close to the gusset that comes forward from the steering box area. I'll let you know how it turns out. Thanks guys....

I bought one of those in 1978. It is still running today. The spacer is 1/4". The stock pump rotor is 1" tall, the HV one is 1-1/4".
I had the engine apart last year and I replaced the gaskets and o-rings. The gasket set only comes with one of the large o-rings and I could not find any place selling just the large o-ring for the chrysler pump. I went to a local hydraulic rebuilder and they were able to get me one.

Edit:

The kit also came with the heavier releif spring IIRC. At that time I was using Valvoline racing 40 W oil. On a cold start, it would peg my 100 lb. mechanical oil gauge. It ran around 80 lb. hot above 2000 rpm, and idled at 60. I am now using VR-1 10-30 racing oil. It is 80 lb. cold and runs at 60 lb, ildles at 30 lb.