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Old 03-01-2016, 04:25 PM
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Join Date: Aug 2007
Location: Middle Haddam, CT
Posts: 251
3.5 V-8 a downsized 6.3?

The similarities in appearance between the small V-8s of the late 60s (and into the 70s and 80s) stongly suggests that they are really just downsized versions of the original early 60s big V-8, the 6.3 that later became the 6.9. I mean, why reinvent the wheel?
Would those of you that are intimately familiar with the design of both care to comment?
Berfinroy in CT
Present vehicles:
1973 300 SEL 4.5
1959 Rolls Royce Silver Cloud I
Past vehicles;
1958 Bentley S 1
1976 ex-Max Hoffman 6.9
1970 300SEL 2.8
1958 Jaguar MK IX
1961 Jaguar MK IX
1963 Jaguar E-type factory special roadster
1948 Plymouth woody
1955 Morgan plus 4
1966 Shelby GT350H Mustang
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Old 03-01-2016, 06:06 PM
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Join Date: Feb 2011
Location: Modesto CA
Posts: 2,816
The relationship of the two is:
Both are V8s
Both have single overhead camshafts & two valves per cylinder
Both made by Mother Benz

Otherwise they are two different designs, not linked by scale.
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Old 03-01-2016, 06:54 PM
Campbelljj's Avatar
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Join Date: Oct 2014
Location: Weeki Wachee FL
Posts: 160
Ditto. Related yes all from mothership. Distinct motors otherwise
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Old 03-03-2016, 10:50 AM
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Join Date: Aug 2002
Location: near Scranton, PA
Posts: 5,176
The 3.5 and 4.5 were the same "Family" of engines and directly linked. The m100 (6.3 and 6.9) were unique completely.
From M-100 Message Board - The rebuild starts !,
An m100 block:

From Tony H, and his 5.6 iron block build, a 4.5 m117 block:

Completely different!
2018 Chrysler Pacifica Limited
1999 Chrysler 300M - 214,141+ miles

1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
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