keep the inline 250 or move on to a 307 sbc

[Scottcoda]

Since I got my 68 gmc I have loved my inline 6 250ci, It is diffrent then most of the 67-72 trucks I see at the shows.. I added a Clifford intake and a holley 390,headers and a few other little upgrades.. At the shows the engine gets alot of attention even for being dirty and always have been proud of it,happy about the fact that I held off the temptation to throw in a sbc.. I have been pricing engine rebuild to see if I could get 1 horse power per cubic inch but the machine shop prices have pretty much crushed that idea.
I have not thought much about doing an v8 swap till an opportunity has come across my path.. a perfectly running 307 that orignally came out of a 1972 c10 but has found it home in a 60's Era Vette for the last 20 years. The owner wanted a more proper plant for his Vette and did a motor swap a few months back storing the 307 in the garage since . The owner painted the motor last year and is including the intake the MSD ignition and distributer.. asking 400 bucks.
Do I stay loyal to my 250 or sell the upgraded parts and move in to the 307?? I do not imagine the swap will be too difficult, It should bolt right up to my th400, possibly need a bigger radiator and new/move the motor mounts? Any and all opinions are appreciated... Thanks to all