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View Full Version : Automotive 4.3L in place of marine in 1990 Donzi?



Hubjeep
01-30-2007, 01:55 PM
Howdy all,
I am still throwing around engine options for my GT210 Donzi. The original 4.3L OMC V6 needs to be replaced. I have yet to pull it out and assess the feasibility of a rebuild, but would like to discuss my options.

From what I hear from a number of people, a 4.3L (s-10 blazer?) automotive block can be used in place of a marine block once brass freeze out plugs are installed and ideally a "towing" or marine camshaft. Any idea what year blocks would work? :confused:

Another option would be to go with a V8, part of me would like to stay with the V6 since besides the block, the only other big part I will need is new manifolds and risers (don't want to risk using the rusty old ones, especially since I do not know their history). Then outdrive ratios come into play, as well as motor mounts, shift linkage, and exhaust routing.

Here is a pic of the current engine:
http://img.photobucket.com/albums/v222/Hubjeep/Donzi/PICT0003-2.jpg

Thanks,
John