Hey, quick question, i was going to buy this gauge cluster and need to know if it will be compatible with my 1985 BMW 528E. This was from a 1983 BMW 528i, will this be compatible? the only difference i see is the rpm readings which go up to 6200 for a redline in stead of 5200 like mine says now. that'd be bad to use this in my car? or not? lemme know, thanks!