A couple of questions:
1.) Does anyone know what the "Modifications" intail?
2.) Am I wasting my money on replacing the exhaust manifold? I do not want to go with headers so the wife will still ride in the car.

The old engine is out and the engine bay is being detailed. I think I am going to order the new 302 in a couple of weeks, it is very exciting.

68 dailydriver

Just do some research to find out what all you need to drop one of these 'newer' engines in your car before ordering.

Good Luck!

Bear in mind you also will have to buy a new HiPo clutch equalizer bar as the left HiPo manifold will interfere with the stock equalizer bar.

There are lots of companies which sell 50oz harmonic balancers with both 3 and 4 bolt pulley threads so you can use the v-belt system or the newer serpentine belt system.
Here is the cheapest I've found: http://www.speedwaymotors.com with part number 91015365-50.

Most of the later model roller SBFs will bolt right up in place of the earlier 289/302s and you will find that with the older style oil pan and front cover, nearly all the early year equipment (heads, intake, exhaust, etc) will bolt right up. Just remember to plug the dipstick hole in the side of the later block if you use the early model waterpump/timing chain cover.

Daniel

Thanks to all of you who have posted over the years I am getting a good education on things I never thought I would think of. As someone explained to me, once you dig into these old cars who knows what!

Some history, I bought a 65 convertible 4 years ago and for the price got a car that had alot of nice new chrome, paint and body panels. The car has been running and I have been enjoying it. Then I get a good idea it is time to start rebuilding the front end and motor.

After taking out the motor, we come to find out the block was dropped, cracked most of the flanges on the rear of the block and alot of welding. Worse the pistons are 60 over already. So that is how I got to the new motor decision. I thought the transmission was a toploader, come to find out it is a warner 4 speed, T10. I am not getting alot of warm fuzzies on this transmission. I have a good (supposedly) transmission guy who has looked it over and says that other than 2nd gear the transmission is good. So do I fix the T10, or go with a new T5 or get a rebuild C4?

Another thing I am kicking myself on is I bought a new Edlebrock carborator 2 years ago. I bought the 1406 with bad advice from an over the counter know nothing mechanic so now I have a spreadbore carborator that I have to run the adapter plate on.

With the new M-6007-B51 which is the new 302 with E303 cam and Y303 Heads GT40. The following items I have confirmed will bolt up:

Timing Cover
Exhaust
WP
Distributor with new gear (I am going to replace with an Excide but do not know which one?
Alternator

I am going to have to purchase the following items new:

I found these at Total Performance in Detroit
50oz harmonic balancer
Clutch Arm Pivot Adapter
Intake-From reading this site I would like to find a CX90 but will probably go with a Edelbrock RPM. I am going to talk with Edlebrock given my carborator screw up.

In regards to headers I was told the following:
They are noisy, they come loose and they leak. I am sure many of you have had luck with them. Armed with that information I decided to lean towards the HIPO exhaust. I was thinking of staying with my single system at this point given that this motor is going to set me back more than budgeted. I am not going to race so something that sounds good but is not loud unless you get on it.

I have had a couple of people tell me I am going to have to change out the flywheel. I am confused, If the motor ships with a 157 tooth flywheel and I balance with a new 50oz harmonic balancer what is the problem. The only thing I can think of is that the size is different. I am going to compare when I get the motor.

I purchased all new front end components and thanks to this site and going to do a Shelby Drop while this is all apart