As cobraman stated you will need an aftermarket bellhousing because the tremec is a bit wider and wont. Looking at the pics and doing some research it looks like the shifter is in the same place.
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Tko 500 vs t5. The two transmissions use completely different architectures and not surprisingly have several unique characteristics that set them apart. If you were racing and did alot of 80mph plus runs get the 600 if not the 500 is good. The product line encompassed the 3550 and tko models. The shifter location moveable on tko shifter base t5 and spline counts are different. The tremec tr3550 5 speed was both a product and a product line. Autorestomod manic mechanic gasoline media 75395 views 1855.
6 speed context which we think is 100 percent the wrong way to approach the decision. Tko 500 2595 upgraded synchronized 282900 w pro 50 shifter 300400 bronze shift fork pads surface enhancement processed hubs sliders internal shift linkage upgrade carbon fiber blocking rings2nd 3rd 4th gear face plated 317900 w pro 50 shifter 335400 face plate engagement conversion2nd 3rd. The difference between the two models was in the gear ratios and the input shaft spline count. People often evaluate the tko and magnum only in 5 speed vs. Each model had two versions one being a 068 overdrive and the other being a 08 overdrive. That being said as far as mocking up a t5 for a car using the tko later it is pretty close but the transmission rear mount will have to be couple inches rearward of the t5 location.
From socal do a t5 unless you really need the beef of the tko series trans the tko is wider and the trans mount is further back. Identifying and trouble shooting borg warner t5 five speed episode136 autorestomod duration. The difference on the 500 versus the 600 is all preferance on your gear splits.