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vlbob2
07-18-2010, 04:58 PM
having trouble with circa 1978 thunderbolt ignition on 454 bbc. some kind of disc trigger nobody seems to have seen before p/n 332 3984A33 ? Wondering about MSD 83606 ready to run distributor or 8560 with 6M-2 cd box and coil? Want to be sure I am going upgrade and not backwards. you all have been very helpfull with new heads on my 350 and cooling 350, so I am asking again. So, what ignition system for older 454? Thanks, Bob. Also, Does anyone have expierence with the MSD #83606 ready-to-run distributor with CD built in?

gcarter
07-18-2010, 05:38 PM
I don't know what the relative difference in price is, but you could easily update to a newer T-bolt IV on eBay.
I've tracked these before and have seen all kinds of prices and there's always a lot available.

mrfixxall
07-18-2010, 06:26 PM
having trouble with circa 1978 thunderbolt ignition on 454 bbc. some kind of disc trigger nobody seems to have seen before p/n 332 3984A33 ? Wondering about MSD 83606 ready to run distributor or 8560 with 6M-2 cd box and coil? Want to be sure I am going upgrade and not backwards. you all have been very helpfull with new heads on my 350 and cooling 350, so I am asking again. So, what ignition system for older 454? Thanks, Bob


msd is good stuff but the 6m-2 box's dont seem to last as log as the 6al box.. i have the msd distributor in my x18 and a 6al box..if you decide to go with the 6m you may want to buy 2, 1 for in use and 1 for back up..

MOP
07-19-2010, 09:51 AM
http://marineengineparts.com/shopsite_sc/store/html/page602.html

Every thing is on this page!

HOWARD O
07-19-2010, 12:39 PM
Check your pm's, have I got a deal for you! :yes:

Cuda
07-19-2010, 02:25 PM
That deal Howard has is a TB V with a hipo curve on the distributor. It's in good shape. I wouldn't have swapped it for an MSD distributor. I bought the distributor on ebay, and the hipo box on ebay also. The only difference between a TB IV and a TB V is a knock sensor. I just left it unhooked. Very little can go wrong with today's distributors. In the old days, the first thing you checked were your points.

MOP
07-19-2010, 06:57 PM
My IV is 25 years old and works flawlessly unlike much of the aftermarket stuff, a few years back I bought a spare pack and distributor now gathering dust but there if I ever do need them.

vlbob2
07-22-2010, 02:12 PM
Does anyone have a MSD distributor on a BBC? either the 8560 or 83606?

gcarter
07-22-2010, 02:58 PM
My IV is 25 years old and works flawlessly unlike much of the aftermarket stuff, a few years back I bought a spare pack and distributor now gathering dust but there if I ever do need them.

This is the impression I have about t-Bolts too.
When they go, I'd consider another.

BUIZILLA
07-22-2010, 03:30 PM
Does anyone have a MSD distributor on a BBC? either the 8560 or 83606? yup..

Pismo
07-22-2010, 05:15 PM
I like the Mallory YM/YL replacement stuff.