Don’t forget that if you go with a bigger engine you may also have to change out your coil springs, and you might have to change some of your accessory brackets. Also, if you add a lot more horsepower you may have to beef up or change the transmission and rear-end.
That looks like an easy swap with a good boost in horsepower. You may need to get a 50oz harmonic balancer for it instead of re-using the 28oz on your 289, but other than that everything should fit up nicely.
Hey, if you have to pull it all out anyway, why not? I just went to the 2-row Scott Drake 24" aluminum radiator with 1" rows and Spal electric fans. So far so good on that, but it’s only getting into the 80s right now, and I wasn’t overheating with the 20" radiator unless it was 90+. The real test of Houston summer heat is still to come.
I had to trim it just a bit with the dremel to create clearance for the radiator hoses. I put it on with a universal bracket kit, but I don’t really like the way it looks, so I’m still investigating other mounting options.
Then I ordered pigtails and a relay kit to hook it up on Amazon. Most kits come with a 3/4" NPT temp switch, but my particular intake manifold needed a 1/4" NPT temperature switch, so just verify what size you need before you order.
If the block is a 1964-1965 era I am pretty sure that it would be a 5 bolt bellhousing pattern and not the newer 1967 6 bolt bellhousing pattern. My guess is that someone just added the early heads to the later block.
Ssava, Sorry about your engine. Looks like your on the right track with purchasing one. On the radiator, personally I would stick with a stock style one and go the upgrade route to the wider one. I think they just do that with the big block style one. I actually have a radiator from my 390 automatic parts car that did hold fluid years back when I took it out. You would need to have it flushed and pressure checked, and throw a coat of paint on it. I think I even have a complete set of mounting brackets (two for the bottom and one on top) Big block radiators kinda clamp in place with these three brackets with rubber pads in them. PM me if your interested, and I will get you my phone #. We won’t be coming to Franklin to see our kids until May, but I imagine you and your boys want it done before then. Bright side is the 14 YO are going to learn to replace a motor.
David