Thought it would give you a real owners experience and gives a true reflection of driving and using a trad plus4 with a TR engine. We had a TR4A in the family and it is no slouch believe me! The TR4A engine was the last Triumph built unit, the TR6 being a Leyland offering. Some of the real older classics are just wonderful cars and as long as the steering box is nice and tight they drive much like a later trad. The carburettor/s can't really be beaten when it comes to response and instant pick up and they don't of course have all those recycled gasses and rubbish being directed back into the engine, which kills modern cars. The Ford cross flow and CVH engine's are a joy as well Of the CVH engines I prefer the earlier non injected engine as it responds to everything your right foot does instantly. In the Ford line up it's best combination was in the XR2 with the 5 speed box and that goes like a scolded cat! They do need more attention than the modern car but it is all simple mechanic's and parts are readily available and simple everyday tools see the work done albeit you will need some imperial an A/F tools. Body work is much the same right up to 2019 but of course the alloy and stainless additions on later or really well rebuilt cars has its advantages. When prices are considered a totally original perfect car will hold the highest price, Its history and condition will always win out. A modern classic will generally hold on to its original purchase price, so a 2008 car costing roughly £35,000 will still be around that price today, condition and milage being good. But for those who want to drive a car and have good old fashioned fun at a price that you are not afraid to use it an older trad which has been nicely restored with the additions of the alloy and stainless new parts, maybe a crosshead up grade bringing the suspension up to date will be a good choice and save money. The statement, that you won't make money restoring classic cars is very true, apart from some rare exceptions. So if it's a fun, not a concours restored car, then the 60's plus 4 you highlighted might just be the best of both worlds! However I bet most of us here bought a car that we hadn't gone out to buy, perhaps something we had initially thought would never be in the running.
Remember cash is king and all the time it's in your pocket you have the power!
'"They don't of course have all those recycled gasses and rubbish being directed back into the engine" ...er Sewin, the TR4A has PCV with the crankcase fumes being fed back into the inlet manifold........ 0/10 there mate!
Arwyn