I just recently baught a 1990 W150 w/ a 318. I am looking for a project motor. I came across an article about slight mods to a 318 including bolting on a set of 360 heads that will produce some ponies. My dilema is the fact that I don't know what year range bolts up the same to heads, engine mounts, and tranny in my truck? I found a used 318 out of a 95 model and am wondering if it will bolt right in with no problems?and what year range heads I need to look for for the 95 block. If it does not match up, what is the year range for the 1990? I appriciate any help givin. ThanksChris
1st: Putting 360 heads on a stock 318 will dramatically drop your compression ration down to around 8:1, maybe even lower. To make them work you'd need to at least deck the block or mill the heads to make the combustion chamber volume smaller.1995 is a Magnum style 318, not the LA that your '90 Ram will have. Very much a different engine. You need a true LA small block. 318's from 88-up (I believe) use a roller cam, whereas the older don't. As far as putting in a different engine, anything from 67-91 (I think that's when the Magnums showed up) will bolt in, but you currently have TBI fuel injection, you'll have to transfer that over to an older engine or change to carburetor. Either way it'll bolt in and work with your transmission (my '89 Ram has a trans out of a '71 Satellite). Hope this helps.