K Vin Compares to R Vin

Hello, sorry if this is a stupid question but can someone please tell me the difference in the K Vin and the R Vin 350? I got suckered on a 96 K1500 and was told i needed an R Vin 350 to replace the one it came with but i found a K Vin 350 out of a 97 Tahoe, am i okay to get this or will i run into trouble? Once again sorry if this is a stupid question i have googled, yahoo'd trying to find the difference and if it would match up and all i found was the K Vin was put in "bigger" vehicles whatever the hell that means.

Vin R is a Vortec engine where Vin K is a TBI engine. Vin R has better heads (Vortec L31) , a roller cam, and central sequential fuel injection. Therefore, the Vin R has more HP (265 vs 220) and better torque.

Pretty sure the last year for Vin K was 95 not 97. Check the casting number to be sure.

//2000CAYukon

I got the number off the engine it is K0317FKA was told it came off of a 97 K1500 Suburban at first they said a C1500 but now a K1500. Does that number help with anything?

I got the number off the engine it is K0317FKA was told it came off of a 97 K1500 Suburban at first they said a C1500 but now a K1500. Does that number help with anything?

That is not a casting number off the block, see http://www.mortec.com/location.htm

If it is really a 97, then it should be a VIN R engine.

//2000CAYukon

That is not a casting number off the block, see http://www.mortec.com/location.htm

If it is really a 97, then it should be a VIN R engine.

//2000CAYukon

Sorry my bad, how about 10243880 then i found GH57LG i assume the 57 is for 5.7 Litre but not sure what the GH or LG stand for.

I found out 10243880 is for a 10243880...350...95-00...2 or 4...Vortec truck (http://car.justanswer.com/truck/txjc-zz383-casting-number-10243880#), Gen.I crate motors and "ZZ4", roller cam, one piece rear seal.
Supposedly these can be upgraded to 350 HP No problem has anybody had any experience in this? I have no idea what stock HP is wish i did but dont