1965 Fuel Injection

I've just moved to N.E Pennsylvania, ( Berwick ) and am in need of someone
who is familiar with 1965 Rochester Fuel Injection. I had the unit
"rebuilt" by Jack Podell ($1500.00 ) about a year ago and just recently
re-installed it on my car. It used to run just fine until the seals began
to leak gas due to using 104 octane Sunoco racing fuel. ( Not a good idea
according to Podell ). Now it seems to surge and /or buck when cruising at a
steady speed or under moderate acceleration. It seems to run OK under hard
acceleration. I've been using premium unleaded with Podell supplied lead
additive/octane booster. Any help would greatly be appreciated. Thanks.

P.S. Are there any Corvette Clubs in this neck of the woods ?
Thanks again.