Stealth Conversions, The Parts Division of JTR (Jaguars That Run)

JTR and Stealth Conversions

V-8 Engine Conversion Manuals & Parts

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Please Use the Books Ordering Form to order manuals!
About JTR  

JTR (Jaguars That Run) got started in the mid-1980s by fitting Chevrolet V-8 engines into Jaguars and publishing a manual on how to successfully accomplish the swap.

Jaguars with engine problems can be purchased quite cheaply, and installing a Chevrolet drivetrain usually costs less and is more reliable than repairing the Jaguar engine. The Jaguar V-8 conversion is done for reliability, economy, and in many cases, performance.

JTR went on to perfect the V-8 engine swap for a number of other cars, too; like the Datsun Z, the Volvo 200 Series, and the Chevrolet S-10 Truck. These vehicles are converted to Chevrolet power primarily for performance reasons, not economy or reliability.

We publish manuals that take you step by step through the conversions, offering a wealth of details and advice from our years of experience. You can read excerpts from the manuals by selecting them from the list below.

Stealth Conversions—for engine swap parts & mounting kits


Stealth Conversions is the Parts Division of JTR. We offer special products to assist you in the successful completion of your engine swap. Please see above links to our price lists / order forms — there is a separate form for each category of part.

JTR's conversion manuals cover the following types of information, as well as details specific to each model:


1990 Corvette Engine
Above: 1990 Corvette 350 TPI/700-R4

  • Brackets and Motor Mounts
  • Engine Dress
  • Automatic Transmissions
  • Driveshaft and Differential
  • Engine Compartment
  • Installation
  • Electrical
  • Tachometer Calibration
  • Speedometer Calibration
  • Cooling System
  • Fuel System
  • Exhaust
  • California Smog Laws
  • Air Conditioning
  • Vehicle Speed Sensors

Simplicity, Cost, and Refinement


Chevy S10 Truck with Camaro V-8 engine
(California smog legal)

Our V-8 conversions are done in the simplest most practical, reliable, and economical way we can find. We stick with factory parts and readily available high-quality aftermarket parts. Our finished conversions are made smog legal according to California smog laws in effect at the time of the conversion.

For more about parts, see our PRICE LISTS AND ORDER FORMS using the links above.

We feel anybody can just drop a V-8 into an S-Truck, a Datsun Z, or any other of these cars and make it run. JTR specializes in refining conversions so they perform like factory built vehicles: smooth, quiet, reliable, and functional. Everything must function as stock: air conditioning, shift linkage, clutch release, instrumentation, cooling, and smog controls. The swap must be repeatable, so that people reading the manuals can accomplish a similar swap.

JTR's converted cars are tested and driven daily by different drivers and under varying conditions. We work out all the bugs and problems, so you can do your conversion right the first time. We would rather have a functional, drivable vehicle than one that goes from place to place on a trailer or behind a tow truck.

JTR Publishes Books

JTR does not do engine swaps for the public. JTR only does swaps in order to do the books. Typically, it takes over a year to write a book. Many hours of research and development go into each swap book to insure that it can be practical and repeatible.

We take engine swaps quite seriously. Most of the cars shown in our manuals are used by friends and family for daily transportation. They are not "weekend warriors" driven only occasionally. These are vehicles on which their owners depend. We enjoy seeing people doing good engine swaps and we have written our manuals to help you succeed.

Clean Air

The conversions shown in these manuals are California smog legal. We have found that the people who live in California and do not do a smog legal conversion, usually do a substandard conversion. The reason for this is: if they don't spend the time and money to make it legal, they also don't spend the time and money to do the rest of the conversion properly. See our chapter on California Smog Laws from the Chevrolet S-10 Truck V-8 Conversion Book.

Vehicle Speed Sensors

Stealth Conversions has been offering aftermarket Vehicle Speed Sensors (VSS) for engine swaps since 1991. The speed sensors are smog legal for engine swaps, and have been issued CARB EO #D-371. Without a VSS, the Chevrolet Fuel Injected engines will not run correctly, and they will not pass a California style smog test. Stealth Conversions has several types of vehicle speed sensors designed for easy installation into vehicles that were not equipped with vehicle speed sensors. Also available are relocated Reluctor Rings for 4L60-E transmissions, which allow running speedometer cables.


These manuals were written for people who have a good education in car mechanics, lots of automotive experience, and a good selection of shop tools. They were not written for people who have a tight budget or who are in a hurry.

Our experience shows that maybe half the people who start a conversion finish it in one to six months, and half are not finished even after six months! Engine swaps are not easy. They require good information and painstaking attention to detail. We have seen a lot of dangerous mistakes, such as incorrect fuel hoses, exhaust too close to brake lines, linkages that get stuck...

This is not meant to scare you. It is meant to warn you about the importance of the decision to undertake a conversion. If it sounds expensive and time consuming, it is! It is also very rewarding when it is done right.

Conversion Manuals Currently Available

• Special package: When purchasing V8 conversion manual for S-10 Truck, Datzun Z, Jaguar,
   or Volvo 200, add the Chevy TPI & TBI Engine Swapping Manual for only $19.95 more.


Chevrolet TPI & TBI Engine Swapping Manual
(Includes Astro Van V8) $29.95

Astro Van V-8 Swap
(covered in Chevrolet TPI & TBI Engine Swapping)


Chevrolet S-10 Truck V8 Conversion Manual $34.95
NEW! More pictures of various S-10 V8 Swaps—
And we've added our chapter on California Smog Laws;
our chapter on the New Body Style; and a page from our book that covers the 1995 Camaro LT4/4L60-E into 1988
2wd S-10 Blazer

Add Chevy TPI/TBI Book

Datsun Z V8 Conversion Manual $38.95

Add Chevy TPI/TBI Book

Jaguar V8 Conversion Manual $39.95

Add Chevy TPI/TBI Book

Volvo 200 Series Conversion Manual $29.95

Add Chevy TPI/TBI Book

Volvo 700 V-8 Manual coming in ... ?
You may be wondering when on earth this Volvo book will be finished. I am working on it, but the main reason it is not done yet is because of the time I have had to spend dealing with ongoing problems in my telephone service over the last couple of years. I hope to complete the book this year! In the meantime, if you want to laugh, see my website: Mike and Ma Bell.

Home/Site Map | About JTR | Jaguar | Chevy S-10 | Chevy TPI & TBI | Astro Van V8 | Volvo 200 | Volvo 700 | Datsun Z Car

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JTR engine swapping manuals are available directly from JTR Publishing,
As well as through a number of retailers, including:
Summit Racing (S-10: Part #JTR-S10; Jaguar: Part #JTR-JAG),
JEGS (S-10: Part #116549; TPI & TBI: Part #117942),
Steve Smith Autosports (S-10: Part #S212; TPI & TBI: Part #S195), and
Classic Motorbooks (S-10: Part #116549; TPI & TBI: Part #117942;
  Jaguar: Part #118438; Datsun Z: Part #115501; Volvo 200: Part #122587).

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