5.3 starter
Ill post up a few pics comparing a GTO starter to a LS1 Fbody starter later on
Thanks, Dan
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Fbody, GTO, solenoid is clocked differently

Fbody, GTO, snout height is different. Both appear to cover the Fbody T56 flywheel the same

Fbody, GTO, bolt comparison

Fbody starter on my 5.3. No block interference

Fbody starter MAC mids clearance

GTO starter on my 5.3. Again, no interference

GTO starter MAC mids contact. Header flange isnt flush to the head with this starter

Ready to go!
The 6.0 truck starter is a half inch shorter than the Delco f-body starter. But I think there are two different 6.0 truck starters. My shorter one came from an Escalade.
The bolts holding the housing together on some of the f-body replacement starters are longer than the OEM. One I got from Rockauto was that way. The Autozone was exactly the same length.
I went through all this crap trying to find a starter that cleared my Sanderson shorties I had to use in an LSX swap into a Miata. Ended up using the 6.0 Escalade starter.
Frank




