I am putting a 1984 3.0 mercruiser in my boat which originally had a 2.5L/120hp mercruiser which was a 1978. Everything seems ok except the manifold riser. The 3.0 riser has different size bellows than mine, also the riser ports are different. I see I can use the riser from the 3.0 but the bellows is not going to fit. Is there one out there for this conversion or do I need a different riser or exuast tube to match them up??
