HEI with tach drive - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MOTHERTRUCKERS · 07-28-2003, 09:22 AM

I got in a truck with I think a Mallory. Its an HEI with mechanical tach drive, there is no name or numbers on it. Its the same size as the old duel point corvette tach drive but with HEI. Anybody ever heard of one by Mallory or an HEI conversion for the corvette to HEI? The motor is a 65 365 hp vette motor or so i'm told.

Longhorn Man · 07-28-2003, 04:32 PM

Hmmm, never heard of an HEI with the tach drive...
TTT

ddsmith · 07-28-2003, 04:50 PM

The hard part is finding the HEI, vacuum advance and mech tach drive. I believe you would find what your looking for through Corvette channels. I saw a one of these new at a corvette at carlisle show but it was pretty pricey. The conversion using a already existing dual point distributor with vacuum advance will be much cheaper.

Zeke · 07-28-2003, 05:41 PM

I remember Mallory making a mechnaical tach drive "transistor" distributor about the mid 70's. Never actually saw one except in Hot Rod mag believe Summit ad.

MOTHERTRUCKERS · 07-28-2003, 06:01 PM

This one has mechanical advance,you adjust it with a set screw behind rubber plugs while the motors running.

**Stocker** · 07-28-2003, 07:56 PM

Quote:

Originally posted by MOTHERTRUCKERS
The motor is a 65 365 hp vette motor

A bit OT but you really brought back memories! I used to own one of those - car and all - what a sweet, strong engine! Ahhhhh......

Baradium · 07-28-2003, 08:14 PM

I know you can convert a delco window type dizzy to HEI relatively easily. IH guys do it sometimes to get HEI on an IH for cheap (alternative involves milling and stuff to make an IH dizzy from an existing HEI).

My money's on that he had a dizzy with a tach drive that he converted to HEI.

GMC JUNKIE TOO · 07-28-2003, 10:27 PM

You can buy a new tach drive HEI from davis unified ignition.

Lippyp · 07-29-2003, 05:02 AM

Try asking Mallory direct at http://www.mrgasket.com/mallorymain.html and go to the asktech section, I have found them to be helpful in the past.

07-28-2003, 09:22 AM	#1
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	HEI with tach drive I got in a truck with I think a Mallory. Its an HEI with mechanical tach drive, there is no name or numbers on it. Its the same size as the old duel point corvette tach drive but with HEI. Anybody ever heard of one by Mallory or an HEI conversion for the corvette to HEI? The motor is a 65 365 hp vette motor or so i'm told. __________________ Rest in Peace Ed. Thanks for all the good times.

07-28-2003, 04:50 PM	#3
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	The hard part is finding the HEI, vacuum advance and mech tach drive. I believe you would find what your looking for through Corvette channels. I saw a one of these new at a corvette at carlisle show but it was pretty pricey. The conversion using a already existing dual point distributor with vacuum advance will be much cheaper. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

07-28-2003, 05:41 PM	#4
Zeke Active Member Join Date: Jun 2002 Location: L.A. Lower Alabama Posts: 453	I remember Mallory making a mechnaical tach drive "transistor" distributor about the mid 70's. Never actually saw one except in Hot Rod mag believe Summit ad. __________________ 1969 C10 350 3spd 1995 GMC 3500 XC 350 dually When Thomas Edison worked late into the night on the electric light, he had to do it by gas lamp or candle. I'm sure it made the work seem that much more urgent. George Carlin

07-28-2003, 06:01 PM	#5
MOTHERTRUCKERS Registered User Join Date: Dec 1999 Location: BRADENTON FLA Posts: 3,269	This one has mechanical advance,you adjust it with a set screw behind rubber plugs while the motors running. __________________ Rest in Peace Ed. Thanks for all the good times.

07-29-2003, 05:02 AM	#9
Lippyp English Chevy Owner Join Date: May 2002 Location: Shropshire, UK/ Lot, France Posts: 1,848	Try asking Mallory direct at http://www.mrgasket.com/mallorymain.html and go to the asktech section, I have found them to be helpful in the past. __________________ Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission

07-28-2003, 04:32 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Hmmm, never heard of an HEI with the tach drive... TTT

07-28-2003, 08:14 PM	#7
Baradium Binder Rep Join Date: Jan 2001 Location: Salcha, AK Posts: 1,506	I know you can convert a delco window type dizzy to HEI relatively easily. IH guys do it sometimes to get HEI on an IH for cheap (alternative involves milling and stuff to make an IH dizzy from an existing HEI). My money's on that he had a dizzy with a tach drive that he converted to HEI.

07-28-2003, 10:27 PM	#8
GMC JUNKIE TOO THE QUICKER FIXERUPER Join Date: Jul 2002 Location: Ok Posts: 615	You can buy a new tach drive HEI from davis unified ignition.



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