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73-87 Chevy _ GMC Trucks => Performance => Topic started by: fbody on April 15, 2010, 09:12:17 am

Title: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: fbody on April 15, 2010, 09:12:17 am

I am buying a book for my 73 online and waiting for it to arrive.  anyone have the timing specs handy, 73 C20, 454.  need timing and dwell for the points.  thanks in advance.

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: jaredts on April 15, 2010, 09:45:19 am

Sorry can't help.  Points, though--whew!  I'd have to change to HEI right away if that were mine.  I just don't have time for all of the maintenance.

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: Donut on April 15, 2010, 09:26:48 pm

My Haynes manual tells me dwell for a V-8 is 29-31 degrees, timing it says to see the Vehicle emissions control information sticker.  Mine has been unreadable for years.  IIRC, my smallblock called for 4 deg. BTDC.  That's by sometimes faulty memory.  (currently running about 12 deg btdc)

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: fbody on April 15, 2010, 10:12:03 pm

cool, thanks for the info.

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: VileZambonie on April 15, 2010, 10:17:00 pm

Definitely ditch the points.

Here's your factory specs with auto trans 29° - 31° dwell. Point gap .016" (used) .019" (new) 10°BTDC

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: fbody on April 20, 2010, 08:57:01 am

yea, no question on getting HEI.  I need to get it running well, for drivability.  New truck for me, so taking care of the small stuff.  Not new to GM stuff, just this one was a screamin deal.  thanks again.  its green, ratty, but a big block 3/4 ton, no rust generally ok vehicle that Ive named "the hulk".  In  CA, pre-75 are key years, as they do not require smog certs anymore.  so, has a few good things going for it.

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: VileZambonie on April 22, 2010, 05:06:00 am

Here's a reallly good deal http://cgi.ebay.com/ebaymotors/SBC-BBC-CHEVY-CLEAR-CAP-65K-HEI-DISTRIBUTOR-6500-CL_W0QQitemZ330417792997QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item4cee6f67e5

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: beastie_3 on April 22, 2010, 02:04:11 pm

I bought some other stuff from that ebay company without any problems.

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: jaredts on April 23, 2010, 12:40:48 pm

That's too cheap to believe!  Forget tuning up with a new cap and rotor--just buy a new distributor every 30,000 miles!

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: VileZambonie on April 23, 2010, 05:53:14 pm

I've actually used a few and bought 2 extra's to keep in stock no joke.

Title: Re: timing setting for 73 C20 w/ 454, anyone have a book handy?
Post by: 78 Chevyrado on April 23, 2010, 06:23:44 pm

Dang.  I want one.  one of those will be mine!  heck it's only $20 cheaper than a cap and rotor kit....   wow!