390ci? with TFS heads and motorsports x cam? sure, that would be great, but if you're gonna swap in an engine how about a bennet 408 basic dart short block, add some edelbrock victor jr. 70cc heads, an edelbrock victor ford 5.8L intake and just for fun lets say an ATI Procharger D-1SC supercharger and an intercooler. then maybe a T-56 and a DL 9". wow! you'd be hard pressed to find a car quicker than that on the street.
has anyone ever seen 'servin it up'? how about darius 240z?
check this
http://darius240z.com/240z.htm
that is what you would get with the above combo, a car that can outrun an R1 streetbike. hell yeah!