273 swap to 318/ build, cost, potential, daily driver

With the 273, The machine shop put me at $950-$1100 for tanking, magging and cleaning the heads and block, also includes valve job (give or take additional work or parts needed), installing freeze plugs, installing cam bearings and cam (when and if one was found without other major costly modifications) that’s a rough estimate and description… WITHOUT machine work and reusing the existing piston rings, wrist pins and the like, no boring either, they suggested a new cam and crank… (both rusted and pitted) then a rough estimate of $350-450 in additional parts… rod and main bearings, oil pump, water pump and so on… they did mention difficulties in finding head gaskets (.040) and a few other concerns… this still leaves with either rodding the original radiator at unknown condition or $700 for a new one…

So, please, if you have the time and patience, educate me here with my options and how or why I should take on the 273 or the 318 or a magnum or any other ideal solutions and how to solve the transmission and or exhaust and rear end concerns, if any, or anything else that I might be missing.

With This new information regarding the 273 not being “my dads engine” I am open to any and all best solve-all solutions to get back on the road… that includes whatever engine l, shifter and or transmission changes as well, I am not dedicated or stuck on any particular path here, it’s a clean slate of a 65 barracuda… what can I do today that’ll Ill appreciate and be thankful that I did in 10 years? As rusty ratrod mentioned I did find a 5.2 magnum with a warranty for $1500…

In the end, for what you want, the 273 would be the best in my opinion. There are a lot of different parts and adjustments to be made with any other engines, if all you need is a cam and crankshaft (273 or 318). Head gaskets are nothing, been using small block ( 273, 318, 340, 360) Fel-Pro .040 head gaskets since the 70's. Everything else being the same. Fix the trans and the small 7 1/4 rear should be fine with the 273. Every engine has plus and minus points. A 273 has closed chamber heads, 8.8:1 compression, bushed rods, and a solid cam valvetrain. Use the original exhaust manifolds, they will work with 273, 318 or magnum ports. A 273 in good condition will have plenty of power in an 65 Barracuda. I ran a 273 from mild to wild for 20+ years and 250,000 miles. You can always upgrade later down the road. All that being said, take some time and see what is available.