Datsun 240Z bucket seat guide

Planted Technology SB138, at 185.50 pounds, is the vehicle-specific bracket for the Nissan and Datsun 240Z 1970 to mid-1974. It picks up the factory floor mounting points without cutting anything. Planted list it twice (SB138 and SB138-1), and either listing gets you the right part. If you want it confirmed against your chassis number before it ships, give us the number and we will check with them before anything goes out.

Three patterns: 291mm x 330mm (Cobra), 345mm x 271mm (Sparco and OMP) and the standard shared third pattern. Most aftermarket seats from those brands bolt straight to the bracket. The Auto Style Type Retro at 345mm x 280mm is not one of the three, so ask us before pairing it.

Yes. The Planted bracket goes to the floor as normal, and a pair of Sparco FIA steel side mount brackets (75 pounds) goes between the bracket and the seat. This is the route for fixed back FIA shells. It adds height to the seat position, so if the roof is close on the driver already, a base mount seat straight to the bracket is the lower build.

Yes. The Sportsman is designed for genuine classic and vintage cars and the 240Z qualifies. It is listed for both 291mm x 330mm and 345mm x 271mm, so it sits on either set of holes in the Planted bracket. At 390 pounds it is a reclining seat rated road and track, covering all heights and a 32 to 38 inch waist.

Yes. Base mount Sparco, OMP and Corbeau seats share the 345mm x 271mm bolt pattern, so any frame drilled to that pattern takes all three. The Planted SB138 publishes that pattern as one of its three, so any of those seats bolt onto it. Recaro sub-frames are a separate system and there is no Recaro listing for the 240Z.

Six are listed: Safety Devices bolt-in rear cage at 447 pounds and 6 point bolt-in at 747 pounds in UK spec, Safety Devices USA spec equivalents at 534 and 883 pounds, Custom Cages CDS weld-in at 1,275.53 pounds and T45 weld-in at 1,607.42 pounds. If the car is a US import, the USA spec Safety Devices cage is the correct one, not the UK spec. Custom Cages describe their options as historic spec, built for the 240Z in period racing trim.

It depends on which market the car was built for. Datsun sold large numbers in the US, so many Z cars now in the UK are American imports. The Safety Devices D004 USA cage is built to the US market body dimensions and the D004 UK cage is built to the UK body. If the car came from the States, the USA spec cage is the one to order. If you are not sure, send us the VIN and we will help confirm which applies.

The straps want mounting behind the seat at roughly shoulder height, and there is nothing in the factory S30 bodywork at that point. A harness bar or a roll cage gives you a proper mounting point. Every Safety Devices bolt-in cage on this page has a harness bar built in, and the bolt-in rear cage at 447 pounds may be used on its own if you do not need a full cage.

Planted list the 240Z bracket twice, under two part numbers, both for the same application. Ordering from either listing gets you the same bracket. The description says they will confirm against your chassis number if you want certainty before shipping, which is worth doing if the car is at the edge of the 1970 to 1974.5 build window.

Yes. The Planted listing flags this directly: rust around the seat mounting points is a standing problem on the S30, along with the frame rails and the areas under the sills. Pull up the carpet and look at the floor before ordering anything. The bracket bolts to the floor and the floor needs to be solid. Finding a rust issue after the seats arrive is a much worse outcome than finding it beforehand.