I'll add some comments and experiences about my former '92 Cummins with a proud 1st Gen body wrapped around it.
('91 1/2 and LATER are the trucks that came with the intercooler, CPL 1351 (21cm2 hot end housing, CPL 1579 (18cm2 hot end housing), and these engines had 7mm injector bores, vs 9mm on the earlier ones. The 7mm left more metal on the head between the valves and injectors, and solved any head cracking problems. )
The motor had about 170k on it in May,(just broken in), and as it looking "naked", I saw it as lean muscle, i. e. no pudge or baby fat, sitting in an engine compartment you could actually work in.
The gearbox was a Getrag, with no problems, as was the stock clutch.
The only gear to consider is the 3. 54. No compromise, end of discussion.
Injectors were JRE's, modified tips and pintles. Not extrude honed.
Hot end turbo housing was a 16cm2.
Exhaust was 3 1/2 Banks, properly modified and muffled at JRE.
Pump was bench turned up, and timed at 1. 35mm (critical)
Mpg was 22+, Power was Big Medicine.
This is of course, a brief description of the truck that had never let me down, or stranded, for quite a few years.
Rich M: Scan some of the past posts, and the 1st Gen archives for some interesting tips, tales, and advice along the 1st Gen trail.
Good hunting.
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'98 2500, Cummins 12v, 5spd, 4wd, 3. 55, 300 injectors, JRE III power kit, 4" turbo to tail system, boost/pyro, did I mention 12 valves? GOT DIESEL?
[This message has been edited by old school (edited 07-14-2000). ]