I guess that's kinda a cool update, my opinion doesn't really matter though.
Love seeing that fresh new sound system installed, really brings out the engine's performance and tone.
Love the way you took that old block engine and turned it into a beast of an inline-6.
I love how you incorporated the client's favorite color into the new design, it really makes it pop.
Your stance on engine swap is spot on, I've done it myself and got great results.