VO910THP Pad # ?
 

I would like to decode this # located on passenger side front head location.

VO9 10 THP

Thanks

Re: VO910THP Pad # ?
 

Quick search shows:

THP 1971 307 conv. cab, m/t 200hp 2bbl C-20 to 3500


Looks like a good start... Does not seem out of line for a 1970 or 1971 date cast on the small block.

Re: VO910THP Pad # ?
 

V 0910: Flint, Mi September 10

THP: 71 307 Truck 200hp manual trans, L14 RPO, 1 2bbl carb C20/C30 application
Looks like GM may have reused this code later on too according to my suffix code book but The Lime Book doesn't list THP for anything but the '71 307.
https://www.ncrs.org/ok/LIME_BOOK_2018.pdf

1985 350 Truck 165 hp manual trans LS9 RPO 1 4bbl carb C/K 10-30 application

Re: VO910THP Pad # ?
 

Thanks so much guy’s ! Looks like I have the original engine in my 71 C/20 , 307, 2 brl, stick , conventional cab. The little 307 still has its engine lift brackets in place.

Re: VO910THP Pad # ?
 

Casting number will confirm it.

Re: VO910THP Pad # ?
 

1985 350 block would have the dipstick on the passenger side.

Gary

Re: VO910THP Pad # ?
 

Thanks Gary, the dipstick is on drivers side. The engine has no extra accessories on it so working on it’s actually enjoyable..thanks for your help again..Jack