/ /

1988 V8 Mazda RX-7 Convertible Auto Chevy 305 700R4 Swap Driving Project

Make: Mazda
Model: RX-7
SubModel: Convertible
Type: Convertible
Trim: Convertible
Year: 1988
Mileage: 154,746
VIN: JM1FC3516J0106362
Color: Black
Engine: V8
Cylinders: 8
Fuel: Gasoline
Transmission: Automatic
Drive type: RWD
Interior color: Gray
Drive side: Left-hand drive
Vehicle Title: Clear
Item location: Buffalo Grove, Illinois, United States

1988 Mazda RX-7 Convertible Additional Info:

Fast Facts:

-~150K on Body, ~100K-120K on installed Pontiac 305 V8

-Starts, goes, stops, but it’s a driving project.


-Clear title

- JM1FC3516J0106362

--Basic Info & Installed Parts--

-150,000 miles on body / ~100K-120K the small block 305 V8 out of a 1988 Firebird using Granny’s Speedshop engine cradle kit

-New power steering pump (Connected/installed but bypassed)

-Comes with additional complete PS rack, lines, and Mazda pump from a 130K mile car.

-Fresh oil, filter, spark plugs, & rebuilt Holley 4160 carburetor

-Hedman Hedders 69640 Street Headers (2.5” collector)

-Mr. Gasket external electric fuel pump, fuel pressure regulator and gauge

-Summit Water temp, oil pressure, voltage gauges

-700R4 automatic transmission with B&M ratchet shifter

-Stock RX7 rear differential (Non-LSD) with a custom driveshaft

-Manuals & receipts for most parts installed and parts that I purchased (Over $800 worth)

-Box full of extra/removed Chevy & Mazda parts

--What it needs--

-Exhaust- I piecemealed one from scraps I had around the garage just so it isn’t dumping right out the headers. It scrapes pulling out the driveway, definitely needs a better one installed.

-Connect power steering- New GM PS pump is installed on the engine and plumed to the rack, but a pressure reducer fitting needs to be installed to match the operating pressure of the Mazda rack. (I have a link to the part) The pump pulley is bypassed so it can be driven as is without the pump turning. I have a suspicion that the rack seals are/were blown out so an extra PS rack, lines, and Mazda pump come with it. I would suggest swapping the rack (1hr job) and using the Granny’s speed shop adapter bracket to use the Mazda pump on a Chevy Engine. (~$50)

-Convertible Top. There is one installed, but there are plenty of holes. I glued on marine grade canvas as a temporary solution in the event I was ever caught out in the rain. I have before & after pics.

-Keys. The car is wired up to start off switches installed on a blanking plate where the radio normally would be. The car has no keys and should not be locked. (Fuel door and trunk do open/function)


This is a driving project car that I purchased back in March 2016 with the V8 already swapped in. I’m selling to get another bike. It starts, runs, and stops all under its own power however the stock gauges do not work. The company site that makes the engine cradle kit has complete instructions on how to get them working. (Can provide a link) I have only taken it around the block a few times as a shakedown run to test a new fix or installed part. From what I can see I have not come across anything that is "obviously unsafe" that would keep someone from driving it home, but like with any used car you do so at your own risk. (Keep in mind no power steering and bootleg exhaust!) It has some rust, dings, and scratches that any 29 year old car has, and have tried to capture all of them in the pics. If you want more of a specific area or place just let me know. I sprayed it (5/27/17) with three gallons of PlastiDip followed by some spray wax to make it less "rubbery" feeling and have a nice satin finish. Tires have about 30% tread left, hold air, but are starting to show dry cracks.

Possible trades are fuel injected motorcycles, 2000+ regular cab short bed V8 trucks, or Datsuns

Video walk around and virtual test drive: https://youtu.be/oOY6irn1KBc

Link to 90+ pics: https://flic.kr/s/aHskJMokch

DropBox link to receipts and info: https://www.dropbox.com/sh/ib3piv142ebvmmb/AAAYaIr1rCtvCQAU19Dyhi7Qa?dl=0