glide

You've probably seen my other recent thread where I asked the community what I should put in my 66. I am currently running a tired 350 from a 1070 C-10. Time for an upgrade. Considering swapping in BB 427. If I were to purchase a longblock 427 are there any other changes to the car needed for this to be a reliable cruiser? I already have the BB hood. The only mod I'm aware of so far is notching the frame for the harmonic balancer. There must be more. I've spent days on 'search' and can't find a list. Stuff like will the radiator shroud still fit...

Also need recommendations on a good Corvette friendly shop on the east coast that can help me on this project.

TIA
John

vettebuyer6369

Moving from Parts classified to General.

Nowhere Man

Do a search there are houndeds of old threads on this. Buy a AIM every thing you need will be in there under RPO L-36 Also ALL 65-67 frames have the notch.

PAmotorman

if your frame is a 66 it will already notched as it started in late 64 getting ready for the 396. you will need a bigger rad

MikeM

A buddy put a 427 is his '63 in 1966. He was on a budget so I think the only parts change he made was radiator hoses to hook the new engine to the 327 radiator.

A five pound sledge took care of the depression in the #1 crossmember.

I also remember he couldn't idle in hot weather without overheating.

Ironcross

A big block core support and copper radiator to fit....That should eliminate the overheat issue....And you may have a heater problem...hoses

Crunch527

Hardest is the frame crossmember.

Things that have to be changed:

Exhaust/headers
Pulleys/brackets
Flywheel/Bell housing/clutch: if you decide to go with the BB larger diameter flywheel/clutch...big blocks had the larger flywheel
Radiator
Hoses
Belts
Starter nose if you go with larger bell/flywheel...

Thats the main stuff...none of it is terribly hard. It all bolts up

409/409

I just did this last spring. I made mine as correct as I could. PM me if you need advice. Also there are many threads on this.

orlandjoe

Did this swap in 1998 with a 1978 454. Pretty much all bolt in. Large radiator a must. Stronger front springs - Moog. Went with a 5-speed Tremec and dual master cyl. Have 35k miles on it and enjoy the ride.

glide

This is more what I had in mind as I try to maintain stock look. Does the bigger radiator just bolt in? Also worried about bell housing...M21 would like to keep.

orlandjoe

Yes you need to install the big block radiator support and shroud. I also added an electric pusher fan in front of the radiator so I could keep the engine pulley fan as well. I went with an 11" clutch so the big block bell housing was needed. The clutch shaft/z-bar setup was different, I think I used a '67 setup there.

Mr D.

Frame cross member aside your looking at about $10K to do this swap out yourself, more if you start paying labor rates.

The attached .pdf file will give you an idea of what is required.

Dennis

1COOL60

Your M21 will bolt to whichever bellhousing you choose, large or small. The only exception would be a '63 bellhousing; they used a smaller register hole, and thus would not work. However, they are rare and priced accordingly.
160

DansYellow66

I assume this is not the actual engine you plan on using - but just representative. I can see a couple issues with that particular one.

Exhaust manifolds would not bolt up to stock, un-cut head pipes or sidepipes

Left valve cover could interfer with a power brake booster if you intend to have PB.

Distributor doesn't have a tach drive.

One wire alternator

You do need a new radiator support for a 66 - 67 BB radiator but you might look into a reproduction 65 BB radiator which resembles a SB radiator. Not sure if the 65 BB radiator support was different from the SB or not - if not then it would drop right in.

glide

Don't know if it's representative or actual. It's what Remanufactured.com said I could get for turn key $6k. I'm leaning more toward just getting their longblock for less than $3k and adding aluminum heads, cam, headers, etc. It's winterish now in WV so I just have start acquiring the necessary parts for a spring install. Have my own original distributor that I will convert to electronic inside. Good pipe bender can make anything exhaust work. Oops, got go. more later. Thanks!

orlandjoe

The front bottom pulley has to be corvette($$$) because it's diameter is less that Impala and Chevelle.

PAmotorman

just built a 427 cu inch small block and you will only have to change the rad to a larger one

409/409

John,
PM sent with my phone number. Also the engine pictured has an AFB, should be a Holley.