Couple of questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Gav2606 · 12-28-2018, 02:51 PM

I have a 400cui small block in my 68 c10. Its had edlebrook performance heads 6073 fitted with edelbrook inlet and 4 barrel holley carb. Any ideas on the power difference this might be.
Also i have the dash light cluster, is it a matter of plug and plag to change over to all gauges.
Thanks

**jocko** · 12-28-2018, 02:56 PM

If you mean power diff from a stock 400, it's maybe 30-45 additional hp, primarily because of the head swap. The improvement depends what spec 400 those bolt ons were bolted to.

Not plug and play but very doable for the instrument cluster swap - take a look here:
http://67-72chevytrucks.com/vboard/s...d.php?t=645940

(EIDT: Link fixed

)

**truckster** · 12-28-2018, 03:01 PM

What year and model did the 400 come out of? That would have a bearing on cam and compression ratio, which is going to have a big effect on how much power you produce.

Gav2606 · 12-28-2018, 03:12 PM

I believe the engine when i did a decoder on the engine number came from a 73 van. I havnt the number to hand to check. Im not sure on what was changed internally on the engine..feels torquey as hell. May have to stick it on a rolling road. Been told ran 13s 1/4 mile. Its got a th400 fitted with camaro 10 bolt rear.
Ive not long owned it so just trying to get some info with stripping it apart.
Thanks for the info on the dash swap.

**truckster** · 12-28-2018, 06:09 PM

Quote:

Originally Posted by Gav2606

I believe the engine when i did a decoder on the engine number came from a 73 van. I havnt the number to hand to check. Im not sure on what was changed internally on the engine..feels torquey as hell. May have to stick it on a rolling road. Been told ran 13s 1/4 mile. Its got a th400 fitted with camaro 10 bolt rear.

The 400 SBC was built for torque. Those heads will certainly help.

demian5 · 12-28-2018, 06:28 PM

Why no upgraded cam to go with the heads and intake? You are not getting all of the added performance without one.

Gav2606 · 12-29-2018, 09:32 AM

Ive been told its had alot of internal work done aswell. Ive not long had it and was all done before. Apparently it has different cams etc in it..will have to take a look when i get time n strip it apart..

12-28-2018, 02:51 PM	#1
Gav2606 Registered User Join Date: Apr 2018 Location: Highbridge Posts: 38	Couple of questions I have a 400cui small block in my 68 c10. Its had edlebrook performance heads 6073 fitted with edelbrook inlet and 4 barrel holley carb. Any ideas on the power difference this might be. Also i have the dash light cluster, is it a matter of plug and plag to change over to all gauges. Thanks

12-28-2018, 02:56 PM	#2
jocko Senior Member Join Date: Oct 2009 Location: Godley, TX Posts: 17,934	Re: Couple of questions If you mean power diff from a stock 400, it's maybe 30-45 additional hp, primarily because of the head swap. The improvement depends what spec 400 those bolt ons were bolted to. Not plug and play but very doable for the instrument cluster swap - take a look here: http://67-72chevytrucks.com/vboard/s...d.php?t=645940 (EIDT: Link fixed ) Last edited by jocko; 12-28-2018 at 03:01 PM.

12-28-2018, 03:01 PM	#3
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,804	Re: Couple of questions What year and model did the 400 come out of? That would have a bearing on cam and compression ratio, which is going to have a big effect on how much power you produce. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson

12-28-2018, 03:12 PM	#4
Gav2606 Registered User Join Date: Apr 2018 Location: Highbridge Posts: 38	Re: Couple of questions I believe the engine when i did a decoder on the engine number came from a 73 van. I havnt the number to hand to check. Im not sure on what was changed internally on the engine..feels torquey as hell. May have to stick it on a rolling road. Been told ran 13s 1/4 mile. Its got a th400 fitted with camaro 10 bolt rear. Ive not long owned it so just trying to get some info with stripping it apart. Thanks for the info on the dash swap.

12-28-2018, 06:28 PM	#6
demian5 Registered User Join Date: Aug 2016 Location: Lake Forest, CA Posts: 2,177	Re: Couple of questions Why no upgraded cam to go with the heads and intake? You are not getting all of the added performance without one. __________________ "Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC

12-29-2018, 09:32 AM	#7
Gav2606 Registered User Join Date: Apr 2018 Location: Highbridge Posts: 38	Re: Couple of questions Ive been told its had alot of internal work done aswell. Ive not long had it and was all done before. Apparently it has different cams etc in it..will have to take a look when i get time n strip it apart..



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