"I saw these manuals at the Nats and anyone that want´s to check their numbers should buy one, these are incredible, my hat’s off to you David that had made these. I can´t believe anyone put this amount of work into it. BUY ONE"! 



“Dave just let me review his new book at the GS Nationals and all I can say is that anyone that owns a GS and wants help to try to decipher and authenticate their GS,I highly recommend getting this book.”

Carl R. 


"These are the best books you can buy if you really want to verify your car. David rules"!
Duane H.


"Got my 71 G.S manual, this book is awesome, lots of info is in this book. 2 thumbs up for David this is a must have." 



"WOW David got your book today thanks! Awesome impressive. that's a lot of time /work! Your a walking Encyclopedia."



“Just got in the mail today David Walker's GSX "By The Numbers" book and like his other books is an excellent read and a wealth of information pertaining to these great cars”.


  "I received my 70 GS book last Friday. Awesome reference material and I really appreciate it". 



They are a good source for someone trying to restore a correct car. A definite time saver”


 “My opinion is it's well worth the cost!!! Thanks David” 


"Got mine today, excellent work. Thanks for putting all that together David"!

Jerry W.

 "Great book and Info! (This will come in handy for my stock appearing Drag Car)"
Todd M.


 "Received my book today and after "skimming" through it have already learned some stuff I did not know after 20 plus years of racing and restoring 1970 Buicks"!