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Reviews (36)

29 June 2021
Very informative
This book is well written, and goes into great detail of the rebuild.

12 June 2025
A must have for getting the most out of your Chevy 6!
Everything you need to know about the in-line 6-cylinder Chevy engine. Divided into easy-to-read sections covering history, block, heads, accessories, and more. Last section deals with higher performance parts and tricks. Worthwhile book to have if considering using the 194, 250, or 292 engines. Color pictures would have made it even better.

11 September 2017
Constructed well, high quality brass.
Made of high quality brass, this unit is based on the original GM proportioning valve, and is similar in the dimensions. All ports have excellent threading, with no machining debris evident. Intake ports standard 7/16-24 and 1/2-20 threads. Front brake ports 3/8-24 threads for standard 3/16" brake lines. Now for the rear brake port- comes with 9/16-18 threads, and the center flare is sized for 1/4" tube. Requires an adapter ( not included) to run a 3/16" rear brake line. This unit should have the option of 3/8-24 rear port threading. Consider the clearance you will need for the adapter and tubing nut out of the rear when mounting. All in all a good value for the price