Dkfiii88manche Posted March 22, 2015 Share Posted March 22, 2015 I have an '88 comanche with the straight 6 cylinder renix engine. I would like to put a Chevy 305 small block in her. I was wondering how difficult the conversion will be. I Know that there will be some difficulties, but in general how hard will it be? Link to comment Share on other sites More sharing options...
husky410ohio Posted March 22, 2015 Share Posted March 22, 2015 There are many parts made for this conversion by Novak and Advance Adapters. I have a 350 Chevy SM465 transmission http://comancheclub.com/topic/45604-88-pioneer-4x4-long-bed-with-350-chevy-sm465-truck-transmission-motor-swap/?hl=350+chevy Link to comment Share on other sites More sharing options...
gogmorgo Posted March 22, 2015 Share Posted March 22, 2015 The 305 is externally identical to the 350, so you need the same stuff for the swap. There's got to be info out there on swapping one into an XJ, if you use the Googles. I'm curious why did you chose the 305? Link to comment Share on other sites More sharing options...
benjy_26 Posted March 22, 2015 Share Posted March 22, 2015 Unless you're going with a TPI 305, I'd say just go 350. Same external dimensions and same amount of work to get it in. Link to comment Share on other sites More sharing options...
az comanches Posted March 22, 2015 Share Posted March 22, 2015 Check out the thread Busy Day by Kansasshogun hes doing a 350 swap. Link to comment Share on other sites More sharing options...
Dkfiii88manche Posted March 23, 2015 Author Share Posted March 23, 2015 I have a 305 that has some work done to it. My 6 cylinder renix that's in my manche is acting Wierd. It's burning oil, but it only throws smoke when I'm climbin hills. It doesn't make sense. It's not like there's a crazy amount of miles on it. It's Got 118,000 on it. It is bothering the hell out of me. If you have any insight it would be awesome. Link to comment Share on other sites More sharing options...
Dkfiii88manche Posted March 23, 2015 Author Share Posted March 23, 2015 The 305 is externally identical to the 350, so you need the same stuff for the swap. There's got to be info out there on swapping one into an XJ, if you use the Googles. I'm curious why did you chose the 305? Link to comment Share on other sites More sharing options...
yxmj Posted March 23, 2015 Share Posted March 23, 2015 In My Humble opinion put the money you would put into the swap into a stout 4L and you would be better off in the end. This is an excerpt of an article that I keep on the tool box for any 4L doubters ( keep in mind that the Motors the are talking about are stock....we have not even mentioned a 4L stroker yet......) When the 4.0 burst onto the scene, it had a full 180 horsepower in the Wrangler (a German publication listed it as 172 horsepower, and, in the Cherokee, it started out with 177 hp). In 1990, when the 4.0 still had 177 hp, the GM 4.3L V6 only made 160 hp, the Ford 4.9L I6 (used in the F150 and Econoline) only made 145 hp, the Ford 4.0 V6 made 155 hp, the Chrysler 5.2L made 170 hp, the Jeep/AMC 2bbl 360 V8 made 144 hp, and the Nissan 3.0 V6 (used in the Pathfinder) made 153 hp. Jeep upped the ante in 1991, when the Cherokee's version made 190 hp. The YJ didn't get the 4.0 until the 1990s (it was still using the old 258 six). When the YJ did get the 4.0, it only made 181 hp... possibly due to a more restrictive exhaust. Peter wrote: In 1987 I wondered why they didn't drop the 4.0 I6 into the YJ, which was still using the 112-117 hp 258 (4.2 liter) six; or the Eagle, Concord and Grand Wagoneer, which came with the four-barrel 360 V8, making just 144 hp. The 4.0 I6 made more power than the Ford 302 V8, Chevy 305, Chrysler 318, and AMC 360, as well as any of the 6 cylinder engines the Japanese were putting in their trucks... and it had comparable or better fuel economy. An AMC Concord with the 177HP 4.0 I6 might have been a better police pursuit vehicle than the Dodge Diplomats (140-150HP), Chevy Caprices (160-170HP) and Ford Crown Victorias (160-165HP). The Dodge Dakota, Ram, and vans would have been better with this engine rather than the 3.9L V6 or the pre-Magnum 318 V8. Compared with other contemporary engines, the 4.0 was strong up until the end. Link to comment Share on other sites More sharing options...
Tommy Posted March 24, 2015 Share Posted March 24, 2015 Stock for stock, in its day, the 4.0 was very good. But once you break away from stock it's much easier to make power with a small block Chevy, though I don't understand the 305 over a 350 or 400. Plus a v8 sounds better. Link to comment Share on other sites More sharing options...
Dkfiii88manche Posted March 24, 2015 Author Share Posted March 24, 2015 V8's deffinetlly sound awsome. I was gonna put a 305 in her number one, I hav one already and number two the 305 can rev higher than a 400 or 350. After talking to some ppl on this site, I may just stick with my RENIX engine. Better gas mileage and the RENIX's are virtually indestructible. Link to comment Share on other sites More sharing options...
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