Understand that different breeds can often have genetic differences as to cololr.
For example: the Cubalaya. Some of my best typed birds are white. If I needed (which I don't) to improve the BBR variety I'd use White in heartbeat (I realize you said BLR and not BBR). Also, I've made my Red Pyles with the Whites and BBR.
To me what is most important in Type (if that is what needs help) is the Female. Regardless of the colors used; they are secondary (even if they require a few years to fix) to Type. You said it was Type you wanted to fix in your initial question. Thus, it should be the Female that is introduced and not a Male.
For example: the Cubalaya. Some of my best typed birds are white. If I needed (which I don't) to improve the BBR variety I'd use White in heartbeat (I realize you said BLR and not BBR). Also, I've made my Red Pyles with the Whites and BBR.
To me what is most important in Type (if that is what needs help) is the Female. Regardless of the colors used; they are secondary (even if they require a few years to fix) to Type. You said it was Type you wanted to fix in your initial question. Thus, it should be the Female that is introduced and not a Male.