Motor Mounts and Conversion Kits

Various Submissions

This page is ultimately going to have a listing of the available XJ-6/12 conversion mount suppliers and photos of their mounts. Hopefully there will be reviews of each mount type and some FAQ information about pros & cons of each type.

Jaguar Services, Inc.
By Mike Stanford: These are better known as the "Mundorf" mount after their creator, Gary Mundorf and are the only mount that is patented. Particular advantages include not having to modify the oil-pan on a typical Chevy 350 to make it fit. The main disadvantage is that the engine rides a bit higher than some others and this will limit your carb/air-cleaner choices somewhat. For example, with a Carter AFB carb and a manifold that is .5" taller than stock, locating a factory air cleaner proved impossible and a custom unit had to be fabricated. The mounts are made from 3 pieces of 11ga mild steel and MIG welded. The welds on my mounts were what I would call "minimalist" and under normal usage the foward weld on the RH mount popped loose due to mount flex. Julian Mundorf (Gary's son) tells me that the mount has been updated since mine were originally sold (like 9 years ago) and that they are now handling all aspects of the fabrication in-house to insure constant quality. All three pieces use existing body and mounting holes and bolt right up to the car with no modifications. The rubber components are available at NAPA- Front isolators are P/N 602-1106 and the rear is P/N 620-1045. About $26 for all three rubber pieces. Jags Service sells the mounts as part of a complete kit only unless you ask real nice. Their kit includes all the pieces required to make a conversion happen including a custom radiator, driveshaft, wiring, AC hoses, brackets, etc. as well as a full instruction manual. The kit is $1,299 and Jags Service is very easy to deal with and quite helpful. The photos below are of early Mundorf mounts that were damaged and repaired after a collision so they are not great examples of the product.

View of RH mount from front                              View of RH mount from above


View of RH mount fron the rear                                View of center transmission mount from below
Photos shown for illustration purposes only. These mounts are patented.

Jaguars That Run
By Mark Chiampi: These mounts were designed by Mike Knell—who is well known in the automotive realm for his engine swapping knowledge. These mounts are strong, simple, and inexpensive. The mounts require modification of the oil pan (see pictures), which is additional work, but allows for better placement of the engine in the bay. The JTR mounts and oil pan modification allow the engine to sit ½" lower and ¾" more forward than most kits. This allows use of even high-rise manifolds, while still providing hood clearance on an XJ-6/12 engine swap. Note: the author is using an Edelbrock Performer RPM manifold (high rise) and a Carter AFB carb., with minimal hood clearance problems. The front mounts are 1/4" mild steel bent twice with 5 holes drilled in them. These attach to stock ’65 to ’72 Chevy truck motor mounts (Chevy P/N# 3990332) using 1 ½" thick spacers between the motor mounts and the block. The rear mount is a strap of 3/8" steel bent into a gull wing shape with 5 holes drilled in it. It uses a Chevy Caprice or equivalent mount (Chevy P/N# 475940) and works with TH-350, TH-400 or 700-R4 trannys.

JTR does not sell extensive kits, but does offer an illustrated XJ "Jaguar V-8 Conversion Manual" for $34.95 plus $5.00 shipping. This book offers detailed instructions, explanations, part numbers, and templates for all the materials needed to perform a conversion without a kit. It is a bargain in my opinion. JTR also sells a mount set (Mounts, spacers, shims, and tranny linkage mount) for $175. JTR is the way to go if one wishes to save money and do the work himself—assuming one has the ability.

John's Cars, Inc.

Chad Bolles Jaguar Performance

Suncoast Conversions