Does anyone have any recommendations on where I can source a donor engine?

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I see them pop up periodically on facebook marketplace. I wouldn’t be surprised at all if Marine Sales in Harrison two MI has one, or Peter Henkel, or Vanness Engineering, but those will be $$$$

I don't know the dimensions of a Q engine but a possible option would be to use a 4.3 Vortec,  it is 21.5" tall would make the same or better Hp.  Since it would sit further aft you might be able to modify the mount rails by cutting down the wood and installing heavy aluminum C channel for mounting.

fwiw Tim

I think the 383 is the same block as his 327, and 22" tall.  Made to replace his engine easily, if it isn't too tall.  I'm lusting for a pair, but dunno if they would fit where my 350Q are.

Timothy "Tim" Miller said:

I don't know the dimensions of a Q engine but a possible option would be to use a 4.3 Vortec,  it is 21.5" tall would make the same or better Hp.  Since it would sit further aft you might be able to modify the mount rails by cutting down the wood and installing heavy aluminum C channel for mounting.

fwiw Tim

The  283, 327,350 and 383 are  all the  same  block  with  different  bores and strokes.  My  thought with  the  4.3, a 350 minus 2 cylinders and  a different  fuel  system , might provide  clearance.

The shorter engine will be less tall when sitting at an angle, and the same hp would be safe for the transmission, shaft, prop.  The 383 would probably need a stronger transmission, and a down-angle transmission would allow the engine to sit level and not need as much height.  But then the engine bed would have to be modified to set the engine flat.  All thoughts I'm having about replacing my engines.

Also, the 383 weighs almost 1000-pounds in ads, seems like a lot more than a 327 or 350, but I'm not sure.  Hard to know if I'm getting fully dressed marine engine weights.  I don't know why the 383 would weigh more with same block, aluminum heads and intake.

Timothy "Tim" Miller said:

The  283, 327,350 and 383 are  all the  same  block  with  different  bores and strokes.  My  thought with  the  4.3, a 350 minus 2 cylinders and  a different  fuel  system , might provide  clearance.

We just pulled the qa from ken luke's 1970 XK-19.  This week.

As the motor had a couple dead cylinders and the PO had swapped the orig 327 block for a 400 which is a strange choice  for a boat motor.

We will be using a new  350 and bolting on all of the 327 stuff back on.

The 383 would be a nice power option as well  but would involve total refitting of the new set up as it would sit in the bilge 180° compared to the QA. Yes you can use an inline velvet drive v drive with that set up or you could choose to use a down angle ZF v drive . 

Either way I'd estimate the engine and trany at about 1000 lbs.

1,000lbs is fairly accurate for a Chris Craft 327 and transmission, according to Chris Craft my 327F and transmission is 904lbs, Vdrive would be more. 

Scott Miller said:

The shorter engine will be less tall when sitting at an angle, and the same hp would be safe for the transmission, shaft, prop.  The 383 would probably need a stronger transmission, and a down-angle transmission would allow the engine to sit level and not need as much height.  But then the engine bed would have to be modified to set the engine flat.  All thoughts I'm having about replacing my engines.

Also, the 383 weighs almost 1000-pounds in ads, seems like a lot more than a 327 or 350, but I'm not sure.  Hard to know if I'm getting fully dressed marine engine weights.  I don't know why the 383 would weigh more with same block, aluminum heads and intake.

Timothy "Tim" Miller said:

The  283, 327,350 and 383 are  all the  same  block  with  different  bores and strokes.  My  thought with  the  4.3, a 350 minus 2 cylinders and  a different  fuel  system , might provide  clearance.

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