383 refresh combo opinions..
I have decided to refresh the 383 going in my 71 Demon and have this planned for it -
68 383 2bbl out of New Yorker derby car - seen video of it running - sat outside for a month uncovered
.030" over bore w/ KB162's or 366AP's
The decks have been milled (I measured the deck to piston @.015"-.020")
.022" head gaskets were on it and plan to use them again
Comp XE268H-10 cam (268/280 .477/.480 w/ 1.5 - may run a 1.6 rocker for more lift - .508/.512 w/ 1.6 rocker)
71 440 "346" heads, unknown aftermarket springs came on them - going to use them- plan on a clean up porting of them before freshening them as well as milling to clean them - these are off a running 440 and only have a stripped plug hole - but no sense in saving a buck on the heads when I'm having the engine done..
Edelbrock RPM intake w/ 1" open spacer (best of both worlds) - possibly a little porting on this as well
Holley 750 4160VS carb
crank under drive pulley
Summit 1 3/4" headers, 2.5" x pipe, and Dynomax Ultraflows (Summit tail pipes stock tips)
stock 727 w/ shift kit, Hurst shifter
B body 8 3/4 w/ 3.23 suregrip
Comp's Camquest says the cam works with the stock converter and that is my plan to keep it for budget sake if you guys now of a better one feel free to chime in! The motor will take all winter to save for so any of this could change -
I am considering the 366AP's as there is a wholesaler on eBay selling a full set of pistons/cast rings for $290 shipped (Summit wants $468 for them)
Let me know what you think- the motor does run currently but has a tiny ridge in the bores, scoring on the crank/rod journals, as well as the "pits" in the valley filled with very fine metal (lots of metal- and lots came out of the lower bearings when I flushed it with straight ATF)
Also would 3" exhaust net any real gains over 2.5" even with the same Dynomax mufflers (straight thru Ultraflow oval mufflers)
I have decided to refresh the 383 going in my 71 Demon and have this planned for it -
68 383 2bbl out of New Yorker derby car - seen video of it running - sat outside for a month uncovered
.030" over bore w/ KB162's or 366AP's
The decks have been milled (I measured the deck to piston @.015"-.020")
.022" head gaskets were on it and plan to use them again
Comp XE268H-10 cam (268/280 .477/.480 w/ 1.5 - may run a 1.6 rocker for more lift - .508/.512 w/ 1.6 rocker)
71 440 "346" heads, unknown aftermarket springs came on them - going to use them- plan on a clean up porting of them before freshening them as well as milling to clean them - these are off a running 440 and only have a stripped plug hole - but no sense in saving a buck on the heads when I'm having the engine done..
Edelbrock RPM intake w/ 1" open spacer (best of both worlds) - possibly a little porting on this as well
Holley 750 4160VS carb
crank under drive pulley
Summit 1 3/4" headers, 2.5" x pipe, and Dynomax Ultraflows (Summit tail pipes stock tips)
stock 727 w/ shift kit, Hurst shifter
B body 8 3/4 w/ 3.23 suregrip
Comp's Camquest says the cam works with the stock converter and that is my plan to keep it for budget sake if you guys now of a better one feel free to chime in! The motor will take all winter to save for so any of this could change -
I am considering the 366AP's as there is a wholesaler on eBay selling a full set of pistons/cast rings for $290 shipped (Summit wants $468 for them)
Let me know what you think- the motor does run currently but has a tiny ridge in the bores, scoring on the crank/rod journals, as well as the "pits" in the valley filled with very fine metal (lots of metal- and lots came out of the lower bearings when I flushed it with straight ATF)
Also would 3" exhaust net any real gains over 2.5" even with the same Dynomax mufflers (straight thru Ultraflow oval mufflers)
